Method, device, and system for transmitting or receiving uplink control channel in wireless communication system

ABSTRACT

A UE in a wireless communication system is disclosed. The UE includes a communication module and a processor for controlling the communication module. The processor determines a first cyclic shift (CS) value based on hybrid automatic repeat request acknowledgment (HARQ-ACK) information representing a response to a downlink channel having been received from a base station, determines a CS offset based on request information representing a request to be transmitted from the UE to the base station, determines a second CS value representing a degree of cyclic-shifting a base sequence to be used in a physical uplink control channel (PUCCH) based on the first CS value and the CS offset, and transmits the PUCCH for simultaneous transmission of the request information and the HARQ-ACK information using a sequence generated by cyclic-shifting the base sequence based on the second CS value.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent ApplicationNo. PCT/KR2018/009297 filed on Aug. 13, 2018, which claims the priorityto Korean Patent Application No. 10-2017-0102653 filed in the KoreanIntellectual Property Office on Aug. 11, 2017, Korean Patent ApplicationNo. 10-2017-0116220 filed in the Korean Intellectual Property Office onSep. 11, 2017, and Korean Patent Application No. 10-2017-0116433 filedin the Korean Intellectual Property Office on Sep. 12, 2017, the entirecontents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a wireless communication system. Moreparticularly, the present disclosure relates to a wireless communicationmethod, device, and system for transmitting or receiving an uplinkcontrol channel.

BACKGROUND ART

After commercialization of 4th generation (4G) communication system, inorder to meet the increasing demand for wireless data traffic, effortsare being made to develop new 5th generation (5G) communication systems.The 5G communication system is called as a beyond 4G networkcommunication system, a post LTE system, or a new radio (NR) system. Inorder to achieve a high data transfer rate, 5G communication systemsinclude systems operated using the millimeter wave (mmWave) band of 6GHz or more, and include a communication system operated using afrequency band of 6 GHz or less in terms of ensuring coverage so thatimplementations in base stations and terminals are under consideration.

A 3rd generation partnership project (3GPP) NR system enhances spectralefficiency of a network and enables a communication provider to providemore data and voice services over a given bandwidth. Accordingly, the3GPP NR system is designed to meet the demands for high-speed data andmedia transmission in addition to supports for large volumes of voice.The advantages of the NR system are to have a higher throughput and alower latency in an identical platform, support for frequency divisionduplex (FDD) and time division duplex (TDD), and a low operation costwith an enhanced end-user environment and a simple architecture.

For more efficient data processing, dynamic TDD of the NR system may usea method for varying the number of orthogonal frequency divisionmultiplexing (OFDM) symbols that may be used in an uplink and downlinkaccording to data traffic directions of cell users. For example, whenthe downlink traffic of the cell is larger than the uplink traffic, thebase station may allocate a plurality of downlink OFDM symbols to a slot(or subframe). Information about the slot configuration should betransmitted to the terminals.

In order to alleviate the path loss of radio waves and increase thetransmission distance of radio waves in the mmWave band, in 5Gcommunication systems, beamforming, massive multiple input/output(massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analogbeam-forming, hybrid beamforming that combines analog beamforming anddigital beamforming, and large scale antenna technologies are discussed.In addition, for network improvement of the system, in the 5Gcommunication system, technology developments related to evolved smallcells, advanced small cells, cloud radio access network (cloud RAN),ultra-dense network, device to device communication (D2D), vehicle toeverything communication (V2X), wireless backhaul, non-terrestrialnetwork communication (NTN), moving network, cooperative communication,coordinated multi-points (CoMP), interference cancellation, and the likeare being made. In addition, in the 5G system, hybrid FSK and QAMmodulation (FQAM) and sliding window superposition coding (SWSC), whichare advanced coding modulation (ACM) schemes, and filter bankmulti-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparsecode multiple access (SCMA), which are advanced connectivitytechnologies, are being developed.

Meanwhile, in a human-centric connection network where humans generateand consume information, the Internet has evolved into the Internet ofThings (IoT) network, which exchanges information among distributedcomponents such as objects. Internet of Everything (IoE) technology,which combines IoT technology with big data processing technologythrough connection with cloud servers, is also emerging. In order toimplement IoT, technology elements such as sensing technology,wired/wireless communication and network infrastructure, serviceinterface technology, and security technology are required, so that inrecent years, technologies such as sensor network, machine to machine(M2M), and machine type communication (MTC) have been studied forconnection between objects. In the IoT environment, an intelligentinternet technology (IT) service that collects and analyzes datagenerated from connected objects to create new value in human life canbe provided. Through the fusion and mixture of existing informationtechnology (IT) and various industries, IoT can be applied to fieldssuch as smart home, smart building, smart city, smart car or connectedcar, smart grid, healthcare, smart home appliance, and advanced medicalservice.

Accordingly, various attempts have been made to apply the 5Gcommunication system to the IoT network. For example, technologies suchas a sensor network, a machine to machine (M2M), and a machine typecommunication (MTC) are implemented by techniques such as beamforming,MIMO, and array antennas. The application of the cloud RAN as the bigdata processing technology described above is an example of the fusionof 5G technology and IoT technology. Generally, a mobile communicationsystem has been developed to provide voice service while ensuring theuser's activity.

However, the mobile communication system is gradually expanding not onlythe voice but also the data service, and now it has developed to theextent of providing high-speed data service. However, in a mobilecommunication system in which services are currently being provided, amore advanced mobile communication system is required due to a shortagephenomenon of resources and a high-speed service demand of users.

DISCLOSURE Technical Problem

An object of the present disclosure provides a method and device forefficiently transmitting a signal in a wireless communication system, inparticular, a cellular wireless communication system. An object of thepresent disclosure also provides a method for transmitting or receivingan uplink control channel, a device and a system therefor.

An object of the present disclosure also provides a method forsimultaneously transmitting HARQ-ACK information and uplink controlinformation other than the HARQ-ACK information.

An object of the present disclosure also provides a method forallocating a resource for transmitting an uplink control channel whensimultaneously transmitting an uplink control channel and an uplinkshared channel.

An object of the present disclosure also provides a method for mappingthe uplink control information on the resources allocated for the uplinkshared channel when transmitting the uplink control information on theresource on which the uplink shared channel is transmitted.

Technical Solution

According to an exemplary embodiment of the present disclosure, a UserEquipment (UE) in a wireless communication system may include acommunication module and a processor for controlling an operation of thecommunication module. The processor may be configured to determine afirst cyclic shift (CS) value based on hybrid automatic repeat requestacknowledgment (HARQ-ACK) information representing a response to adownlink channel having been received from a base station, determine aCS offset based on request information representing a request to betransmitted from the UE to the base station, determine a second CS valuerepresenting a degree of cyclic-shifting a base sequence to be used in aphysical uplink control channel (PUCCH) based on the first CS value andthe CS offset, and transmit the PUCCH for simultaneous transmission ofthe request information and the HARQ-ACK information using a sequencegenerated by cyclic-shifting the base sequence based on the second CSvalue.

The request information may include a scheduling request (SR)representing whether to request for uplink wireless resource allocation.Here, the processor may be configured to determine the CS offset basedon whether the SR is a positive SR for requesting for scheduling.

The second CS value may be any one among a plurality of CS valuesdetermined according to the CS offset and a number of bits representingthe HARQ-ACK information. Here, the plurality of CS values may beconfigured with CS values that are different from each other andincrease by an identical interval based on a smallest CS value among theplurality of CS values. In addition, a size of the interval may beconstant regardless of whether the SR is the positive SR.

The base sequence may be cyclic-shifted with N different CS values, theHARQ-ACK information may include m bits, and a size of the interval maybe N/(2{circumflex over ( )}m). In addition, m may be 2, and N may be12.

When the SR is a positive SR, the CS offset may be 1, and when the SR isnot the positive SR, the CS offset may be 0.

When the SR is not the positive SR, the second CS value may be one among0, 3, 6, and 9.

When the SR is the positive SR, the second CS value may be one among 1,4, 7, and 10.

A transmission resource of a PUCCH format used for transmission of thePUCCH may be one resource block representing 12 subcarriers in afrequency domain. Here, the processor may be configured to transmit thePUCCH using the PUCCH format.

The transmission resource of the PUCCH format may be one or two symbolsin a time domain.

The request information may include a beam recovery request (BR)representing whether to request for recovery for a beam failure. Here,the processor may be configured to transmit the PUCCH through a firstPUCCH resource configured so that the SR and the HARQ-ACK informationare transmitted, when the BR is not a positive BR for requesting forinformation about the beam, and transmit the PUCCH through a secondPUCCH resource configured so that the BR other than the first PUCCHresource is transmitted when the BR is the positive BR.

The processor may be configured to acquire an initial cyclic shiftvalue. In addition the processor may be configured to calculate a phasevalue by which the base sequence is cyclic-shifted based on the initialCS value and the second CS value, and generate the sequence bycyclic-shifting the base sequence by the phase value.

According to another exemplary embodiment of the present disclosure, amethod of operating a User Equipment (UE) in a wireless communicationsystem may include: determining a first cyclic shift (CS) value based onhybrid automatic repeat request acknowledgment (HARQ-ACK) informationrepresenting a response to a downlink channel having been received froma base station; determining a CS offset based on request informationrepresenting a request to be transmitted from the UE to the basestation; determining a second CS value representing a degree ofcyclic-shifting a base sequence to be used in a physical uplink controlchannel (PUCCH) based on the first CS value and the CS offset; andtransmitting the PUCCH for simultaneous transmission of the requestinformation and the HARQ-ACK information using a sequence generated bycyclic-shifting the base sequence based on the second CS value.

The request information may include a scheduling request (SR)representing whether to request for uplink wireless resource allocation.In addition, the determining the CS offset may include determining theCS offset based on whether the SR is a positive SR for requesting forscheduling.

The second CS value may be any one among a plurality of CS valuesdetermined according to the CS offset and a number of bits representingthe HARQ-ACK information. In addition, the plurality of CS values may beconfigured with CS values that are different from each other andincrease by an identical interval based on a smallest CS value among theplurality of CS values. Here, a size of the interval may be constantregardless of whether the SR is the positive SR.

The base sequence may be cyclic-shifted with N CS values which aredifferent from each other, and the HARQ-ACK information may include mbits. Here, a size of the interval may be N/(2{circumflex over ( )}m).

When the SR is a positive SR, the CS offset may be 1, and when the SR isnot the positive SR, the CS offset may be 0.

When the SR is not the positive SR, the second CS value may be one among0, 3, 6, and 9.

When the SR is the positive SR, the second CS value may be one among 1,4, 7, and 10.

The request information may include a beam recovery request (BR)representing whether to request for recovery for a beam failure. Here,the transmitting the PUCCH may include transmitting the PUCCH through afirst PUCCH transmission resource configured so that the SR and theHARQ-ACK information are transmitted, when the BR is not a positive BRfor requesting information about a beam, and transmitting the PUCCHthrough a second PUCCH resource configured so that the BR other than thefirst PUCCH resource is transmitted, when the BR is the positive BR.

Advantageous Effects

The present disclosure provides a method and device for efficientlytransmitting a signal in a wireless communication system, in particular,a cellular wireless communication system. The present disclosure alsoprovides a method for transmitting or receiving an uplink controlchannel, a device and a system therefor.

DESCRIPTION OF DRAWINGS

FIG. 1 illustrates an example of a wireless frame structure used in awireless communication system;

FIG. 2 illustrates an example of a downlink (DL)/uplink (UL) slotstructure in a wireless communication system;

FIG. 3 is a diagram for explaining a physical channel used in a 3GPPsystem and a typical signal transmission method using the physicalchannel;

FIG. 4 illustrates an SS/PBCH block for initial cell access in a 3GPP NRsystem;

FIG. 5 illustrates a procedure for transmitting control information anda control channel in a 3GPP NR system;

FIG. 6 illustrates a control resource set (CORESET) in which a physicaldownlink control channel (PUCCH) may be transmitted in a 3GPP NR system;

FIG. 7 illustrates a method for configuring a PDCCH search space in a3GPP NR system;

FIG. 8 is a conceptual diagram illustrating carrier aggregation;

FIG. 9 is a diagram for explaining signal carrier communication andmultiple carrier communication;

FIG. 10 is a diagram showing an example in which a cross carrierscheduling technique is applied;

FIG. 11 is a block diagram showing the configurations of a UE and a basestation according to an embodiment of the present disclosure;

FIG. 12 illustrates an example of a sequence-based short PUCCH formataccording to an embodiment of the present disclosure;

FIG. 13 illustrates an example of a frequency divisionmultiplexing-based short PUCCH format in an NR system according to anembodiment of the present disclosure;

FIG. 14 illustrates PUCCH frequency resources allocated to frequencyresources at locations consecutive to a PUSCH frequency resourceaccording to an embodiment of the present disclosure;

FIG. 15 illustrates PUCCH resources formed according to an embodiment ofthe present disclosure;

FIG. 16 illustrates a PUCCH resource formed according to an embodimentof the present disclosure;

FIG. 17 illustrates a DMRS resource for transmitting a DMRS and PUCCHresources allocated to parts of a PUSCH resource according to anembodiment of the present disclosure;

FIG. 18 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to an embodiment of the present disclosure;

FIG. 19 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to another embodiment of the present disclosure;

FIG. 20 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to another embodiment of the present disclosure;

FIG. 21 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to another embodiment of the present disclosure; and

FIGS. 22 and 23 illustrate UCI mapped onto a PUSCH resource, when two ormore antenna ports are allocated to a DMRS according to an embodiment ofthe present disclosure.

MODE FOR CARRYING OUT THE INVENTION

Terms used in the specification adopt general terms which are currentlywidely used as possible by considering functions in the presentinvention, but the terms may be changed depending on an intention ofthose skilled in the art, customs, and emergence of new technology.Further, in a specific case, there is a term arbitrarily selected by anapplicant and in this case, a meaning thereof will be described in acorresponding description part of the invention. Accordingly, it intendsto be revealed that a term used in the specification should be analyzedbased on not just a name of the term but a substantial meaning of theterm and contents throughout the specification.

Throughout this specification and the claims that follow, when it isdescribed that an element is “connected” to another element, the elementmay be “directly connected” to the other element or “electricallyconnected” to the other element through a third element. Further, unlessexplicitly described to the contrary, the word “comprise” will beunderstood to imply the inclusion of stated elements but not theexclusion of any other elements unless otherwise stated. Moreover,limitations such as “more than or equal to” or “less than or equal to”based on a specific threshold may be appropriately substituted with“more than” or “less than”, respectively, in some exemplary embodiments.

The following technology may be used in various wireless access systems,such as code division multiple access (CDMA), frequency divisionmultiple access (FDMA), time division multiple access (TDMA), orthogonalfrequency division multiple access (OFDMA), single carrier-FDMA(SC-FDMA), and the like. The CDMA may be implemented by a wirelesstechnology such as universal terrestrial radio access (UTRA) orCDMA2000. The TDMA may be implemented by a wireless technology such asglobal system for mobile communications (GSM)/general packet radioservice (GPRS)/enhanced data rates for GSM evolution (EDGE). The OFDMAmay be implemented by a wireless technology such as IEEE 802.11 (Wi-Fi),IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like.The UTRA is a part of a universal mobile telecommunication system(UMTS). 3rd generation partnership project (3GPP) long term evolution(LTE) is a part of an evolved UMTS (E-UMTS) using evolved-UMTSterrestrial radio access (E-UTRA) and LTE-advanced (A) is an evolvedversion of the 3GPP LTE. 3GPP new radio (NR) is a system designedseparately from LTE/LTE-A, and is a system for supporting enhancedmobile broadband (eMBB), ultra-reliable and low latency communication(URLLC), and massive machine type communication (mMTC) services, whichare requirements of IMT-2020. For the clear description, 3GPP NR ismainly described, but the technical idea of the present invention is notlimited thereto.

Unless otherwise specified in this specification, a base station mayrefer to a next generation node B (gNB) as defined in 3GPP NR.Furthermore, unless otherwise specified, a terminal may refer to a userequipment (UE).

Unless otherwise specified herein, the base station may include a nextgeneration node B (gNB) defined in 3GPP NR. Furthermore, unlessotherwise specified, a terminal may include a user equipment (UE).Hereinafter, in order to help the understanding of the description, eachcontent is described separately by the embodiments, but each embodimentmay be used in combination with each other. In the presentspecification, the configuration of the UE may indicate a configurationby the base station. In more detail, the base station may configure avalue of a parameter used in an operation of the UE or a wirelesscommunication system by transmitting a channel or a signal to the UE.

FIG. 1 illustrates an example of a wireless frame structure used in awireless communication system.

Referring to FIG. 1, the wireless frame (or radio frame) used in the3GPP NR system may have a length of 10 ms (Δf_(max)N_(f)/100)*T_(c)). Inaddition, the wireless frame includes 10 subframes (SFs) having equalsizes. Herein, Δf_(max)=480*10³ Hz, N_(f)=4096,T_(c)=1/(Δf_(ref)*N_(f,ref)), Δf_(ref)=15*10³ Hz, and N_(f,ref)=2048.Numbers from 0 to 9 may be respectively allocated to 10 subframes withinone wireless frame. Each subframe has a length of 1 ms and may includeone or more slots according to a subcarrier spacing. More specifically,in the 3GPP NR system, the subcarrier spacing that may be used is15*2^(μ) kHz, and μ can have a value of μ=0, 1, 2, 3, 4 as subcarrierspacing configuration. That is, 15 kHz, 30 kHz, 60 kHz, 120 kHz and 240kHz may be used for subcarrier spacing. One subframe having a length of1 ms may include 2^(μ) slots. In this case, the length of each slot is2^(−μ) ms. Numbers from 0 to 2^(μ)−1 may be respectively allocated to2^(μ) slots within one subframe. In addition, numbers from 0 to10*2^(μ)−1 may be respectively allocated to slots within one subframe.The time resource may be distinguished by at least one of a wirelessframe number (also referred to as a wireless frame index), a subframenumber (also referred to as a subframe number), and a slot number (or aslot index).

FIG. 2 illustrates an example of a downlink (DL)/uplink (UL) slotstructure in a wireless communication system. In particular, FIG. 2shows the structure of the resource grid of the 3GPP NR system.

There is one resource grid per antenna port. Referring to FIG. 2, a slotincludes a plurality of orthogonal frequency division multiplexing(OFDM) symbols in a time domain and includes a plurality of resourceblocks (RBs) in a frequency domain. An OFDM symbol also means one symbolsection. Unless otherwise specified, OFDM symbols may be referred tosimply as symbols. One RB includes 12 consecutive subcarriers in thefrequency domain. Referring to FIG. 2, a signal transmitted from eachslot may be represented by a resource grid including N^(size,μ)_(grid,x)*N^(RB) _(sc) subcarriers, and N^(slot) _(symb) OFDM symbols.Here, x=DL when the signal is a DL signal, and x=UL when the signal isan UL signal. N^(size,μ) _(grid,x) represents the number of resourceblocks (RBs) according to the subcarrier spacing constituent μ (x is DLor UL), and N^(slot) _(symb) represents the number of OFDM symbols in aslot. N^(RB) _(sc) is the number of subcarriers constituting one RB andN^(RB) _(sc)=12. An OFDM symbol may be referred to as a cyclic shiftOFDM (CP-OFDM) symbol or a discrete Fourier transform spread OFDM(DFT-s-OFDM) symbol according to a multiple access scheme.

The number of OFDM symbols included in one slot may vary according tothe length of a cyclic prefix (CP). For example, in the case of a normalCP, one slot includes 14 OFDM symbols, but in the case of an extendedCP, one slot may include 12 OFDM symbols. In a specific embodiment, theextended CP can only be used at 60 kHz subcarrier spacing. In FIG. 2,for convenience of description, one slot is configured with 14 OFDMsymbols by way of example, but embodiments of the present disclosure maybe applied in a similar manner to a slot having a different number ofOFDM symbols. Referring to FIG. 2, each OFDM symbol includes N^(size,μ)_(grid,x)*N^(RB) _(sc) subcarriers in the frequency domain. The type ofsubcarrier may be divided into a data subcarrier for data transmission,a reference signal subcarrier for transmission of a reference signal,and a guard band. The carrier frequency is also referred to as thecenter frequency (fc).

One RB may be defined by N^(RB) _(sc) (e. g., 12) consecutivesubcarriers in the frequency domain. For reference, a resourceconfigured with one OFDM symbol and one subcarrier may be referred to asa resource element (RE) or a tone. Therefore, one RB can be configuredwith N^(slot) _(symb)*N^(RB) _(sc) resource elements. Each resourceelement in the resource grid can be uniquely defined by a pair ofindexes (k, l) in one slot. k may be an index assigned from 0 toN^(size,μ) _(grid, x)*N^(RB) _(sc)−1 in the frequency domain, and l maybe an index assigned from 0 to N^(slot) _(symb)−1 in the time domain.

In order for the UE to receive a signal from the base station or totransmit a signal to the base station, the time/frequency of the UE maybe synchronized with the time/frequency of the base station. This isbecause when the base station and the UE are synchronized, the UE candetermine the time and frequency parameters necessary for demodulatingthe DL signal and transmitting the UL signal at the correct time.

Each symbol of a radio frame used in a time division duplex (TDD) or anunpaired spectrum may be configured with at least one of a DL symbol, anUL symbol, and a flexible symbol. A radio frame used as a DL carrier ina frequency division duplex (FDD) or a paired spectrum may be configuredwith a DL symbol or a flexible symbol, and a radio frame used as a ULcarrier may be configured with a UL symbol or a flexible symbol. In theDL symbol, DL transmission is possible, but UL transmission isimpossible. In the UL symbol, UL transmission is possible, but DLtransmission is impossible. The flexible symbol may be determined to beused as a DL or an UL according to a signal.

Information on the type of each symbol, i.e., information representingany one of DL symbols, UL symbols, and flexible symbols, may beconfigured with a cell-specific or common radio resource control (RRC)signal. In addition, information on the type of each symbol mayadditionally be configured with a UE-specific or dedicated RRC signal.The base station informs, by using cell-specific RRC signals, i) theperiod of cell-specific slot configuration, ii) the number of slots withonly DL symbols from the beginning of the period of cell-specific slotconfiguration, iii) the number of DL symbols from the first symbol ofthe slot immediately following the slot with only DL symbols, iv) thenumber of slots with only UL symbols from the end of the period of cellspecific slot configuration, and v) the number of UL symbols from thelast symbol of the slot immediately before the slot with only the ULsymbol. Here, symbols not configured with any one of a UL symbol and aDL symbol are flexible symbols.

When the information on the symbol type is configured with theUE-specific RRC signal, the base station may signal whether the flexiblesymbol is a DL symbol or an UL symbol in the cell-specific RRC signal.In this case, the UE-specific RRC signal can not change a DL symbol or aUL symbol configured with the cell-specific RRC signal into anothersymbol type. The UE-specific RRC signal may signal the number of DLsymbols among the N^(slot) _(symb) symbols of the corresponding slot foreach slot, and the number of UL symbols among the N^(slot) _(symb)symbols of the corresponding slot. In this case, the DL symbol of theslot may be continuously configured with the first symbol to the i-thsymbol of the slot. In addition, the UL symbol of the slot may becontinuously configured with the j-th symbol to the last symbol of theslot (where i<j). In the slot, symbols not configured with any one of aUL symbol and a DL symbol are flexible symbols.

The type of symbol configured with the above RRC signal may be referredto as a semi-static DL/UL configuration. In the semi-static DL/ULconfiguration previously configured with RRC signals, the flexiblesymbol may be indicated by a DL symbol, an UL symbol, or a flexiblesymbol through dynamic slot format information (SFI) transmitted on aphysical DL control channel (PDCCH). In this case, the DL symbol or ULsymbol configured with the RRC signal is not changed to another symboltype. Table 1 exemplifies the dynamic SFI that the base station canindicate to the UE.

TABLE 1 Symbol number in a slot Index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 0D D D D D D D D D D D D D D 1 U U U U U U U U U U U U U U 2 X X X X X XX X X X X X X X 3 D D D D D D D D D D D D D X 4 D D D D D D D D D D D DX X 5 D D D D D D D D D D D X X X 6 D D D D D D D D D D X X X X 7 D D DD D D D D D X X X X X 8 X X X X X X X X X X X X X U 9 X X X X X X X X XX X X U U 10 X U U U U U U U U U U U U U 11 X X U U U U U U U U U U U U12 X X X U U U U U U U U U U U 13 X X X X U U U U U U U U U U 14 X X X XX U U U U U U U U U 15 X X X X X X U U U U U U U U 16 D X X X X X X X XX X X X X 17 D D X X X X X X X X X X X X 18 D D D X X X X X X X X X X X19 D X X X X X X X X X X X X U 20 D D X X X X X X X X X X X U 21 D D D XX X X X X X X X X U 22 D X X X X X X X X X X X U U 23 D D X X X X X X XX X X U U 24 D D D X X X X X X X X X U U 25 D X X X X X X X X X X U U U26 D D X X X X X X X X X U U U 27 D D D X X X X X X X X U U U 28 D D D DD D D D D D D D X U 29 D D D D D D D D D D D X X U 30 D D D D D D D D DD X X X U 31 D D D D D D D D D D D X U U 32 D D D D D D D D D D X X U U33 D D D D D D D D D X X X U U 34 D X U U U U U U U U U U U U 35 D D X UU U U U U U U U U U 36 D D D X U U U U U U U U U U 37 D X X U U U U U UU U U U U 38 D D X X U U U U U U U U U U 39 D D D X X U U U U U U U U U40 D X X X U U U U U U U U U U 41 D D X X X U U U U U U U U U 42 D D D XX X U U U U U U U U 43 D D D D D D D D D X X X X U 44 D D D D D D X X XX X X U U 45 D D D D D D X X U U U U U U 46 D D D D D X U D D D D D X U47 D D X U U U U D D X U U U U 48 D X U U U U U D X U U U U U 49 D D D DX X U D D D D X X U 50 D D X X U U U D D X X U U U 51 D X X D D D D D XX U U U U 52 D X X X X X U D X X X X X U 53 D D X X X X U D D X X X X U54 X X X X X X X D D D D D D D 55 D D X X X U U U D D D D D D 56-255Reserved

In Table 1, D denotes a DL symbol, U denotes a UL symbol, and X denotesa flexible symbol. As shown in Table 1, up to two DL/UL switching in oneslot may be allowed.

FIG. 3 is a diagram for explaining a physical channel used in a 3GPPsystem (e.g., NR) and a typical signal transmission method using thephysical channel.

If the power of the UE is turned on or the UE camps on a new cell, theUE performs an initial cell search (S101). Specifically, the UE maysynchronize with the BS in the initial cell search. For this, the UE mayreceive a primary synchronization signal (PSS) and a secondarysynchronization signal (SSS) from the base station to synchronize withthe base station, and obtain information such as a cell ID. Thereafter,the UE can receive the physical broadcast channel from the base stationand obtain the broadcast information in the cell.

Upon completion of the initial cell search, the UE receives a physicaldownlink shared channel (PDSCH) according to the physical downlinkcontrol channel (PDCCH) and information in the PDCCH, so that the UE canobtain more specific system information than the system informationobtained through the initial cell search (S102).

When the UE initially accesses the base station or does not have radioresources for signal transmission, the UE may perform a random accessprocedure on the base station (operations S103 to S106). First, the UEcan transmit a preamble through a physical random access channel (PRACH)(S103) and receive a response message for the preamble from the basestation through the PDCCH and the corresponding PDSCH (S104). When avalid random access response message is received by the UE, the UEtransmits data including the identifier of the UE and the like to thebase station through a physical uplink shared channel (PUSCH) indicatedby the UL grant transmitted through the PDCCH from the base station(S105). Next, the UE waits for reception of the PDCCH as an indicationof the base station for collision resolution. If the UE successfullyreceives the PDCCH through the identifier of the UE (S106), the randomaccess process is terminated.

After the above-described procedure, the UE receives PDCCH/PDSCH (S107)and transmits a physical uplink shared channel (PUSCH)/physical uplinkcontrol channel (PUCCH) (S108) as a general UL/DL signal transmissionprocedure. In particular, the UE may receive downlink controlinformation (DCI) through the PDCCH. The DCI may include controlinformation such as resource allocation information for the UE. Also,the format of the DCI may vary depending on the intended use. The uplinkcontrol information (UCI) that the UE transmits to the base stationthrough UL includes a DL/UL ACK/NACK signal, a channel quality indicator(CQI), a precoding matrix index (PMI), a rank indicator (RI), and thelike. Here, the CQI, PMI, and RI may be included in channel stateinformation (CSI). In the 3GPP NR system, the UE may transmit controlinformation such as HARQ-ACK and CSI described above through the PUSCHand/or PUCCH.

FIG. 4 illustrates an SS/PBCH block for initial cell access in a 3GPP NRsystem.

When the power is turned on or wanting to access a new cell, the UE mayobtain time and frequency synchronization with the cell and perform aninitial cell search procedure. The UE may detect a physical cellidentity N^(cell) _(ID) of the cell during a cell search procedure. Forthis, the UE may receive a synchronization signal, for example, aprimary synchronization signal (PSS) and a secondary synchronizationsignal (SSS), from a base station, and synchronize with the basestation. In this case, the UE can obtain information such as a cellidentity (ID).

Referring to FIG. 4A, a synchronization signal (SS) will be described inmore detail. The synchronization signal can be classified into PSS andSSS. The PSS may be used to obtain time domain synchronization and/orfrequency domain synchronization, such as OFDM symbol synchronizationand slot synchronization. The SSS can be used to obtain framesynchronization and cell group ID. Referring to FIG. 4A and Table 2, theSS/PBCH block can be configured with consecutive 20 RBs (=240subcarriers) in the frequency axis, and can be configured withconsecutive 4 OFDM symbols in the time axis. In this case, in theSS/PBCH block, the PSS is transmitted in the first OFDM symbol and theSSS is transmitted in the third OFDM symbol through the 56th to 182thsubcarriers. Here, the lowest subcarrier index of the SS/PBCH block isnumbered from 0. In the first OFDM symbol in which the PSS istransmitted, the base station does not transmit a signal through theremaining subcarriers, i.e., 0th to 55th and 183th to 239th subcarriers.In addition, in the third OFDM symbol in which the SSS is transmitted,the base station does not transmit a signal through 48th to 55th and183th to 191th subcarriers. The base station transmits a physicalbroadcast channel (PBCH) through the remaining RE except for the abovesignal in the SS/PBCH block.

TABLE 2 OFDM symbol number/relative to Channel the start of anSubcarrier number k relative to or signal SS/PBCH block the start of anSS/PBCH block PSS 0 56, 57, . . . , 182 SSS 2 56, 57, . . . , 182 Set to0 0 0, 1, . . . , 55, 183, 184, . . . , 239 2 48, 49, . . . , 55, 183,184, . . . , 191 PBCH 1, 3 0. 1, . . . , 239 2 0, 1, . . . , 47, 192,193, . . . , 239 DM-RS for 1, 3 0 + v, 4 + v, 8 + v, . . . , 236 + vPBCH 2 0 + v, 4 + v, 8 + v, . . . , 44 + v 192 + v, 196 + v, . . . ,236 + v

The SS allows a total of 1008 unique physical layer cell IDs to begrouped into 336 physical-layer cell-identifier groups, each groupincluding three unique identifiers, through a combination of three PSSsand SSSs, specifically, such that each physical layer cell ID is to beonly a part of one physical-layer cell-identifier group. Therefore, thephysical layer cell ID N^(cell) _(ID)3N⁽¹⁾ _(ID)+N⁽²⁾ _(ID) can beuniquely defined by the index N⁽¹⁾ _(ID) ranging from 0 to 335indicating a physical-layer cell-identifier group and the index N⁽²⁾_(ID) ranging from 0 to 2 indicating a physical-layer identifier in thephysical-layer cell-identifier group. The UE may detect the PSS andidentify one of the three unique physical-layer identifiers. Inaddition, the UE can detect the SSS and identify one of the 336 physicallayer cell IDs associated with the physical-layer identifier. In thiscase, the sequence d_(PSS)(n) of the PSS is as follows.d _(PSS)(n)=1−2x(m)m=(n+43N _(ID) ⁽²⁾)mod 1270≤n<127Here, x(i+7)=(x(i+4)+x(i))mod 2 and is given as[x(6)x(5)x(4)x(3)x(2)x(1)x(0)]=[1 1 1 0 1 1 0]Further, the sequence d_(SSS)(n) of the SSS is as follows.

d_(SSS)(n) = [1 − 2 x₀((n + m₀)mod 127)][1 − 2x₁((n + m₁)mod 127)]$m_{0} = {{15\;\left\lfloor \frac{N_{ID}^{(1)}}{112} \right\rfloor} + {5\; N_{ID}^{(2)}}}$m₁ = N_(ID)⁽¹⁾ mod 112 0 ≤ n < 127Here, x ₀(i+7)=(x ₀(i+4)+x ₀(i))mod 2x ₁(i+7)=(x ₁(i+1)+x ₁(i))mod 2and is given as[x ₀(6)x ₀(5)x ₀(4)x ₀(3)x ₀(2)x ₀(1)x ₀(0)]=[0 0 0 0 0 0 1][x ₁(6)x ₁(5)x ₁(4)x ₁(3)x ₁(2)x ₁(1)x ₁(0)]=[0 0 0 0 0 0 1]

A radio frame with a 10 ms length may be divided into two half frameswith a 5 ms length. Referring to FIG. 4B, a description will be made ofa slot in which SS/PBCH blocks are transmitted in each half frame. Aslot in which the SS/PBCH block is transmitted may be any one of thecases A, B, C, D, and E. In the case A, the subcarrier spacing is 15 kHzand the starting time point of the SS/PBCH block is the ({2, 8}+14*n)-thsymbol. In this case, n=0 or 1 at a carrier frequency of 3 GHz or less.In addition, it may be n=0, 1, 2, 3 at carrier frequencies above 3 GHzand below 6 GHz. In the case B, the subcarrier spacing is 30 kHz and thestarting time point of the SS/PBCH block is {4, 8, 16, 20}+28*n. In thiscase, n=0 at a carrier frequency of 3 GHz or less. In addition, it maybe n=0, 1 at carrier frequencies above 3 GHz and below 6 GHz. In thecase C, the subcarrier spacing is 30 kHz and the starting time point ofthe SS/PBCH block is the ({2, 8}+14*n)-th symbol. In this case, n=0 or 1at a carrier frequency of 3 GHz or less. In addition, it may be n=0, 1,2, 3 at carrier frequencies above 3 GHz and below 6 GHz. In the case D,the subcarrier spacing is 120 kHz and the starting time point of theSS/PBCH block is the ({4, 8, 16, 20}+28*n)-th symbol. In this case, at acarrier frequency of 6 GHz or more, n=0, 1, 2, 3, 5, 6, 7, 8, 10, 11,12, 13, 15, 16, 17, 18. In the case E, the subcarrier spacing is 240 kHzand the starting time point of the SS/PBCH block is the ({8, 12, 16, 20,32, 36, 40, 44}+56*n)-th symbol. In this case, at a carrier frequency of6 GHz or more, n=0, 1, 2, 3, 5, 6, 7, 8.

FIG. 5 illustrates a procedure for transmitting control information anda control channel in a 3GPP NR system. Referring to FIG. 5A, the basestation may add a cyclic redundancy check (CRC) masked (e.g., an XORoperation) with a radio network temporary identifier (RNTI) to controlinformation (e.g., downlink control information (DCI)) (S202). The basestation may scramble the CRC with an RNTI value determined according tothe purpose/target of each control information. The common RNTI used byone or more UEs can include at least one of a system information RNTI(SI-RNTI), a paging RNTI (P-RNTI), a random access RNTI (RA-RNTI), and atransmit power control RNTI (TPC-RNTI). In addition, the UE-specificRNTI may include at least one of a cell temporary RNTI (C-RNTI), and theCS-RNTI. Thereafter, the base station may perform rate-matching (S206)according to the amount of resource(s) used for PDCCH transmission afterperforming channel encoding (e.g., polar coding) (S204). Thereafter, thebase station may multiplex the DCI(s) based on the control channelelement (CCE) based PDCCH structure (S208). In addition, the basestation may apply an additional process (S210) such as scrambling,modulation (e.g., QPSK), interleaving, and the like to the multiplexedDCI(s), and then map the DCI(s) to the resource to be transmitted. TheCCE is a basic resource unit for the PDCCH, and one CCE may include aplurality (e.g., six) of resource element groups (REGs). One REG may beconfigured with a plurality (e.g., 12) of REs. The number of CCEs usedfor one PDCCH may be defined as an aggregation level. In the 3GPP NRsystem, an aggregation level of 1, 2, 4, 8, or 16 may be used. FIG. 5Bis a diagram related to a CCE aggregation level and the multiplexing ofa PDCCH and illustrates the type of a CCE aggregation level used for onePDCCH and CCE(s) transmitted in the control area according thereto.

FIG. 6 illustrates a control resource set (CORESET) in which a physicaldownlink control channel (PUCCH) may be transmitted in a 3GPP NR system.

The CORESET is a time-frequency resource in which PDCCH, that is, acontrol signal for the UE, is transmitted. In addition, a search spaceto be described later may be mapped to one CORESET. Therefore, the UEmay monitor the time-frequency domain designated as CORESET instead ofmonitoring all frequency bands for PDCCH reception, and decode the PDCCHmapped to CORESET. The base station may configure one or more CORESETsfor each cell to the UE. The CORESET may be configured with up to threeconsecutive symbols on the time axis. In addition, the CORESET may beconfigured in units of six consecutive PRBs on the frequency axis. Inthe embodiment of FIG. 5, CORESET #1 is configured with consecutivePRBs, and CORESET #2 and CORESET #3 are configured with discontinuousPRBs. The CORESET can be located in any symbol in the slot. For example,in the embodiment of FIG. 5, CORESET #1 starts at the first symbol ofthe slot, CORESET #2 starts at the fifth symbol of the slot, and CORESET#9 starts at the ninth symbol of the slot.

FIG. 7 illustrates a method for setting a PUCCH search space in a 3GPPNR system.

In order to transmit the PDCCH to the UE, each CORESET may have at leastone search space. In the embodiment of the present disclosure, thesearch space is a set of all time-frequency resources (hereinafter,PDCCH candidates) through which the PDCCH of the UE is capable of beingtransmitted. The search space may include a common search space that theUE of the 3GPP NR is required to commonly search and a Terminal-specificor a UE-specific search space that a specific UE is required to search.In the common search space, UE may monitor the PDCCH that is set so thatall UEs in the cell belonging to the same base station commonly search.In addition, the UE-specific search space may be set for each UE so thatUEs monitor the PDCCH allocated to each UE at different search spaceposition according to the UE. In the case of the UE-specific searchspace, the search space between the UEs may be partially overlapped andallocated due to the limited control area in which the PDCCH may beallocated. Monitoring the PDCCH includes blind decoding for PDCCHcandidates in the search space. When the blind decoding is successful,it may be expressed that the PDCCH is (successfully) detected/receivedand when the blind decoding fails, it may be expressed that the PDCCH isnot detected/not received, or is not successfully detected/received.

For convenience of explanation, a PDCCH scrambled with a group common(GC) RNTI previously known to one or more UEs so as to transmit DLcontrol information to the one or more UEs is referred to as a groupcommon (GC) PDCCH or a common PDCCH. In addition, a PDCCH scrambled witha specific-terminal RNTI that a specific UE already knows so as totransmit UL scheduling information or DL scheduling information to thespecific UE is referred to as a specific-UE PDCCH. The common PDCCH maybe included in a common search space, and the UE-specific PDCCH may beincluded in a common search space or a UE-specific PDCCH.

The base station may signal each UE or UE group through a PDCCH aboutinformation (i.e., DL Grant) related to resource allocation of a pagingchannel (PCH) and a downlink-shared channel (DL-SCH) that are atransmission channel or information (i.e., UL grant) related to resourceallocation of a uplink-shared channel (UL-SCH) and a hybrid automaticrepeat request (HARQ). The base station may transmit the PCH transportblock and the DL-SCH transport block through the PDSCH. The base stationmay transmit data excluding specific control information or specificservice data through the PDSCH. In addition, the UE may receive dataexcluding specific control information or specific service data throughthe PDSCH.

The base station may include, in the PDCCH, information on to which UE(one or a plurality of UEs) PDSCH data is transmitted and how the PDSCHdata is to be received and decoded by the corresponding UE, and transmitthe PDCCH. For example, it is assumed that the DCI transmitted on aspecific PDCCH is CRC masked with an RNTI of “A”, and the DCI indicatesthat PDSCH is allocated to a radio resource (e.g., frequency location)of “B” and indicates transmission format information (e.g., transportblock size, modulation scheme, coding information, etc.) of “C”. The UEmonitors the PDCCH using the RNTI information that the UE has. In thiscase, if there is a UE which performs blind decoding the PDCCH using the“A” RNTI, the UE receives the PDCCH, and receives the PDSCH indicated by“B” and “C” through the received PDCCH information.

Table 3 shows an embodiment of a physical uplink control channel (PUCCH)used in a wireless communication system.

TABLE 3 Length in Number PUCCH format OFDM symbols of bits 0 1-2  ≤2 14-14 ≤2 2 1-2  >2 3 4-14 >2 4 4-14 >2

The PUCCH may be used to transmit the following UL control information(UCI).

-   -   Scheduling Request (SR): Information used for requesting a UL        UL-SCH resource.    -   HARQ-ACK: A Response to PDCCH (indicating DL SPS release) and/or        a response to DL transport block (TB) on PDSCH. HARQ-ACK        indicates whether information transmitted on the PDCCH or PDSCH        is received. The HARQ-ACK response includes positive ACK (simply        ACK), negative ACK (hereinafter NACK), Discontinuous        Transmission (DTX), or NACK/DTX. Here, the term HARQ-ACK is used        mixed with HARQ-ACK/NACK and ACK/NACK. In general, ACK may be        represented by bit value 1 and NACK may be represented by bit        value 0.    -   Channel State Information (CSI): Feedback information on the DL        channel. The UE generates it based on the CSI-Reference Signal        (RS) transmitted by the base station. Multiple Input Multiple        Output (MIMO)-related feedback information includes a Rank        Indicator (RI) and a Precoding Matrix Indicator (PMI). CSI can        be divided into CSI part 1 and CSI part 2 according to the        information indicated by CSI.

In the 3GPP NR system, five PUCCH formats may be used to support variousservice scenarios, various channel environments, and frame structures.

PUCCH format 0 is a format capable of delivering 1-bit or 2-bit HARQ-ACKinformation or SR. PUCCH format 0 can be transmitted through one or twoOFDM symbols on the time axis and one PRB on the frequency axis. WhenPUCCH format 0 is transmitted in two OFDM symbols, the same sequence onthe two symbols may be transmitted through different RBs. In this case,the sequence may be a sequence cyclic shifted (CS) from a base sequenceused in PUCCH format 0. Through this, the UE may obtain a frequencydiversity gain. In more detail, the UE may determine a cyclic shift (CS)value m_(cs) according to M_(bit) bit UCI (M_(bit)=1 or 2). In addition,the base sequence having the length of 12 may be transmitted by mappinga cyclic shifted sequence based on a predetermined CS value m_(cs) toone OFDM symbol and 12 REs of one RB. When the number of cyclic shiftsavailable to the UE is 12 and M_(bit)=1, 1 bit UCI 0 and 1 may be mappedto two cyclic shifted sequences having a difference of 6 in the cyclicshift value, respectively. In addition, when M_(bit)=2, 2 bit UCI 00,01, 11, and 10 may be mapped to four cyclic shifted sequences having adifference of 3 in cyclic shift values, respectively.

PUCCH format 1 may deliver 1-bit or 2-bit HARQ-ACK information or SR.PUCCH format 1 maybe transmitted through consecutive OFDM symbols on thetime axis and one PRB on the frequency axis. Here, the number of OFDMsymbols occupied by PUCCH format 1 may be one of 4 to 14. Morespecifically, UCI, which is M_(bit)=1, may be BPSK-modulated. The UE maymodulate UCI, which is M_(bit)=2, with quadrature phase shift keying(QPSK). A signal is obtained by multiplying a modulated complex valuedsymbol d(0) by a sequence of length 12. In this case, the sequence maybe a base sequence used for PUCCH format 0. The UE spreads theeven-numbered OFDM symbols to which PUCCH format 1 is allocated throughthe time axis orthogonal cover code (OCC) to transmit the obtainedsignal. PUCCH format 1 determines the maximum number of different UEsmultiplexed in the one RB according to the length of the OCC to be used.A demodulation reference signal (DMRS) may be spread with OCC and mappedto the odd-numbered OFDM symbols of PUCCH format 1.

PUCCH format 2 may deliver UCI exceeding 2 bits. PUCCH format 2 may betransmitted through one or two OFDM symbols on the time axis and one ora plurality of RBs on the frequency axis. When PUCCH format 2 istransmitted in two OFDM symbols, the sequences which are transmitted indifferent RBs through the two OFDM symbols may be same each other. Here,the sequence may be a plurality of modulated complex valued symbolsd(0), . . . , d(M_(symbol)−1). Here, M_(symbol) may be M_(bit)/2.Through this, the UE may obtain a frequency diversity gain. Morespecifically, M_(bit) bit UCI (M_(bit)>2) is bit-level scrambled, QPSKmodulated, and mapped to RB(s) of one or two OFDM symbol(s). Here, thenumber of RBs may be one of 1 to 16.

PUCCH format 3 or PUCCH format 4 may deliver UCI exceeding 2 bits. PUCCHformat 3 or PUCCH format 4 may be transmitted through consecutive OFDMsymbols on the time axis and one PRB on the frequency axis. The numberof OFDM symbols occupied by PUCCH format 3 or PUCCH format 4 may be oneof 4 to 14. Specifically, the UE modulates M_(bit) bits UCI (M_(bit)>2)with π/2-Binary Phase Shift Keying (BPSK) or QPSK to generate a complexvalued symbol d(0) to d(M_(symb)−1). Here, when using π/2-BPSK,M_(symb)=M_(bit), and when using QPSK, M_(symb)=M_(bit)/2. The UE maynot apply block-unit spreading to the PUCCH format 3. However, the UEmay apply block-unit spreading to one RB (i.e., 12 subcarriers) usingPreDFT-OCC of a length of 12 such that PUCCH format 4 may have two orfour multiplexing capacities. The UE performs transmit precoding (orDFT-precoding) on the spread signal and maps it to each RE to transmitthe spread signal.

In this case, the number of RBs occupied by PUCCH format 2, PUCCH format3, or PUCCH format 4 may be determined according to the length andmaximum code rate of the UCI transmitted by the UE. When the UE usesPUCCH format 2, the UE may transmit HARQ-ACK information and CSIinformation together through the PUCCH. When the number of RBs that theUE may transmit is greater than the maximum number of RBs that PUCCHformat 2, or PUCCH format 3, or PUCCH format 4 may use, the UE maytransmit only the remaining UCI information without transmitting someUCI information according to the priority of the UCI information.

PUCCH format 1, PUCCH format 3, or PUCCH format 4 may be configuredthrough the RRC signal to indicate frequency hopping in a slot. Whenfrequency hopping is configured, the index of the RB to be frequencyhopped may be configured with an RRC signal. When PUCCH format 1, PUCCHformat 3, or PUCCH format 4 is transmitted through N OFDM symbols on thetime axis, the first hop may have floor (N/2) OFDM symbols and thesecond hop may have ceiling(N/2) OFDM symbols.

PUCCH format 1, PUCCH format 3, or PUCCH format 4 may be configured tobe repeatedly transmitted in a plurality of slots. In this case, thenumber K of slots in which the PUCCH is repeatedly transmitted may beconfigured by the RRC signal. The repeatedly transmitted PUCCHs muststart at an OFDM symbol of the constant position in each slot, and havethe constant length. When one OFDM symbol among OFDM symbols of a slotin which a UE should transmit a PUCCH is indicated as a DL symbol by anRRC signal, the UE may not transmit the PUCCH in a corresponding slotand delay the transmission of the PUCCH to the next slot to transmit thePUCCH.

Meanwhile, in the 3GPP NR system, a UE may performtransmission/reception using a bandwidth equal to or less than thebandwidth of a carrier (or cell). For this, the UE may receive theBandwidth part (BWP) configured with a continuous bandwidth of some ofthe carrier's bandwidth. A UE operating according to TDD or operating inan unpaired spectrum can receive up to four DL/UL BWP pairs in onecarrier (or cell). In addition, the UE may activate one DL/UL BWP pair.A UE operating according to FDD or operating in paired spectrum canreceive up to four DL BWPs on a DL carrier (or cell) and up to four ULBWPs on a UL carrier (or cell). The UE may activate one DL BWP and oneUL BWP for each carrier (or cell). The UE may not perform reception ortransmission in a time-frequency resource other than the activated BWP.The activated BWP may be referred to as an active BWP.

The base station may indicate the activated BWP among the BWPsconfigured by the UE through downlink control information (DCI). The BWPindicated through the DCI is activated and the other configured BWP(s)are deactivated. In a carrier (or cell) operating in TDD, the basestation may include, in the DCI for scheduling PDSCH or PUSCH, abandwidth part indicator (BPI) indicating the BWP to be activated tochange the DL/UL BWP pair of the UE. The UE may receive the DCI forscheduling the PDSCH or PUSCH and may identify the DL/UL BWP pairactivated based on the BPI. For a DL carrier (or cell) operating in anFDD, the base station may include a BPI indicating the BWP to beactivated in the DCI for scheduling PDSCH so as to change the DL BWP ofthe UE. For a UL carrier (or cell) operating in an FDD, the base stationmay include a BPI indicating the BWP to be activated in the DCI forscheduling PUSCH so as to change the UL BWP of the UE.

FIG. 8 is a conceptual diagram illustrating carrier aggregation.

The carrier aggregation is a method in which the UE uses a plurality offrequency blocks or cells (in the logical sense) configured with ULresources (or component carriers) and/or DL resources (or componentcarriers) as one large logical frequency band in order for a wirelesscommunication system to use a wider frequency band. One componentcarrier may also be referred to as a term called a Primary cell (PCell)or a Secondary cell (SCell), or a Primary SCell (PScell). However,hereinafter, for convenience of description, the term “componentcarrier” is used.

Referring to FIG. 8, as an example of a 3GPP NR system, the entiresystem band may include up to 16 component carriers, and each componentcarrier may have a bandwidth of up to 400 MHz. The component carrier mayinclude one or more physically consecutive subcarriers. Although it isshown in FIG. 8 that each of the component carriers has the samebandwidth, this is merely an example, and each component carrier mayhave a different bandwidth. Also, although each component carrier isshown as being adjacent to each other in the frequency axis, thedrawings are shown in a logical concept, and each component carrier maybe physically adjacent to one another, or may be spaced apart.

Different center frequencies may be used for each component carrier.Also, one common center frequency may be used in physically adjacentcomponent carriers. Assuming that all the component carriers arephysically adjacent in the embodiment of FIG. 8, center frequency A maybe used in all the component carriers. Further, assuming that therespective component carriers are not physically adjacent to each other,center frequency A and the center frequency B can be used in each of thecomponent carriers.

When the total system band is extended by carrier aggregation, thefrequency band used for communication with each UE can be defined inunits of a component carrier. UE A may use 100 MHz, which is the totalsystem band, and performs communication using all five componentcarriers. UEs B₁˜B₅ can use only a 20 MHz bandwidth and performcommunication using one component carrier. UEs C₁ and C₂ may use a 40MHz bandwidth and perform communication using two component carriers,respectively. The two component carriers may be logically/physicallyadjacent or non-adjacent. UE C₁ represents the case of using twonon-adjacent component carriers, and UE C₂ represents the case of usingtwo adjacent component carriers.

FIG. 9 is a drawing for explaining signal carrier communication andmultiple carrier communication. Particularly, FIG. 9A shows a singlecarrier subframe structure and FIG. 9B shows a multi-carrier subframestructure.

Referring to FIG. 9A, in an FDD mode, a general wireless communicationsystem may perform data transmission or reception through one DL bandand one UL band corresponding thereto. In another specific embodiment,in a TDD mode, the wireless communication system may divide a radioframe into a UL time unit and a DL time unit in a time domain, andperform data transmission or reception through a UL/DL time unit.Referring to FIG. 9B, three 20 MHz component carriers (CCs) can beaggregated into each of UL and DL, so that a bandwidth of 60 MHz can besupported. Each CC may be adjacent or non-adjacent to one another in thefrequency domain. FIG. 9B shows a case where the bandwidth of the UL CCand the bandwidth of the DL CC are the same and symmetric, but thebandwidth of each CC can be determined independently. In addition,asymmetric carrier aggregation with different number of UL CCs and DLCCs is possible. A DL/UL CC allocated/configured to a specific UEthrough RRC may be called as a serving DL/UL CC of the specific UE.

The base station may perform communication with the UE by activatingsome or all of the serving CCs of the UE or deactivating some CCs. Thebase station can change the CC to be activated/deactivated, and changethe number of CCs to be activated/deactivated. If the base stationallocates a CC available for the UE as to be cell-specific orUE-specific, at least one of the allocated CCs can be deactivated,unless the CC allocation for the UE is completely reconfigured or the UEis handed over. One CC that is not deactivated by the UE is called as aPrimary CC (PCC) or a primary cell (PCell), and a CC that the basestation can freely activate/deactivate is called as a Secondary CC (SCC)or a secondary cell (SCell).

Meanwhile, 3GPP NR uses the concept of a cell to manage radio resources.A cell is defined as a combination of DL resources and UL resources,that is, a combination of DL CC and UL CC. A cell may be configured withDL resources alone, or a combination of DL resources and UL resources.When the carrier aggregation is supported, the linkage between thecarrier frequency of the DL resource (or DL CC) and the carrierfrequency of the UL resource (or UL CC) may be indicated by systeminformation. The carrier frequency refers to the center frequency ofeach cell or CC. A cell corresponding to the PCC is referred to as aPCell, and a cell corresponding to the SCC is referred to as an SCell.The carrier corresponding to the PCell in the DL is the DL PCC, and thecarrier corresponding to the PCell in the UL is the UL PCC. Similarly,the carrier corresponding to the SCell in the DL is the DL SCC and thecarrier corresponding to the SCell in the UL is the UL SCC. According toUE capability, the serving cell(s) may be configured with one PCell andzero or more SCells. In the case of UEs that are in the RRC_CONNECTEDstate but not configured for carrier aggregation or that do not supportcarrier aggregation, there is only one serving cell configured only withPCell.

As mentioned above, the term “cell” used in carrier aggregation isdistinguished from the term “cell” which refers to a certaingeographical area in which a communication service is provided by onebase station or one antenna group. That is, one component carrier mayalso be referred to as a scheduling cell, a scheduled cell, a primarycell (PCell), a secondary cell (SCell), or a primary SCell (PScell).However, in order to distinguish between a cell referring to a certaingeographical area and a cell of carrier aggregation, in the presentdisclosure, a cell of a carrier aggregation is referred to as a CC, anda cell of a geographical area is referred to as a cell.

FIG. 10 is a diagram showing an example in which a cross carrierscheduling technique is applied. When cross carrier scheduling is set,the control channel transmitted through the first CC may schedule a datachannel transmitted through the first CC or the second CC using acarrier indicator field (CIF). The CIF is included in the DCI. In otherwords, a scheduling cell is set, and the DL grant/UL grant transmittedin the PDCCH area of the scheduling cell schedules the PDSCH/PUSCH ofthe scheduled cell. That is, a search area for the plurality ofcomponent carriers exists in the PDCCH area of the scheduling cell. APCell may be basically a scheduling cell, and a specific SCell may bedesignated as a scheduling cell by an upper layer.

In the embodiment of FIG. 10, it is assumed that three DL CCs aremerged. Here, it is assumed that DL component carrier #0 is DL PCC (orPCell), and DL component carrier #1 and DL component carrier #2 are DLSCCs (or SCell). In addition, it is assumed that the DL PCC is set tothe PDCCH monitoring CC. When cross-carrier scheduling is not configuredby UE-specific (or UE-group-specific or cell-specific) higher layersignaling, a CIF is disabled, and each DL CC can transmit only a PDCCHfor scheduling its PDSCH without the CIF according to an NR PDCCH rule(non-cross-carrier scheduling, self-carrier scheduling). Meanwhile, ifcross-carrier scheduling is configured by UE-specific (orUE-group-specific or cell-specific) higher layer signaling, a CIF isenabled, and a specific CC (e.g., DL PCC) may transmit not only thePDCCH for scheduling the PDSCH of the DL CC A using the CIF but also thePDCCH for scheduling the PDSCH of another CC (cross-carrier scheduling).On the other hand, a PDCCH is not transmitted in another DL CC.Accordingly, the UE monitors the PDCCH not including the CIF to receivea self-carrier scheduled PDSCH depending on whether the cross-carrierscheduling is configured for the UE, or monitors the PDCCH including theCIF to receive the cross-carrier scheduled PDSCH.

On the other hand, FIGS. 9 and 10 illustrate the subframe structure ofthe 3GPP LTE-A system, and the same or similar configuration may beapplied to the 3GPP NR system. However, in the 3GPP NR system, thesubframes of FIGS. 9 and 10 may be replaced with slots.

FIG. 11 is a block diagram showing the configurations of a UE and a basestation according to an embodiment of the present disclosure. In anembodiment of the present disclosure, the UE may be implemented withvarious types of wireless communication devices or computing devicesthat are guaranteed to be portable and mobile. The UE may be referred toas a User Equipment (UE), a Station (STA), a Mobile Subscriber (MS), orthe like. In addition, in an embodiment of the present disclosure, thebase station controls and manages a cell (e.g., a macro cell, a femtocell, a pico cell, etc.) corresponding to a service area, and performsfunctions of a signal transmission, a channel designation, a channelmonitoring, a self diagnosis, a relay, or the like. The base station maybe referred to as next Generation NodeB (gNB) or Access Point (AP).

As shown in the drawing, a UE 100 according to an embodiment of thepresent disclosure may include a processor 110, a communication module120, a memory 130, a user interface 140, and a display unit 150.

First, the processor 110 may execute various instructions or programsand process data within the UE 100. In addition, the processor 110 maycontrol the entire operation including each unit of the UE 100, and maycontrol the transmission/reception of data between the units. Here, theprocessor 110 may be configured to perform an operation according to theembodiments described in the present disclosure. For example, theprocessor 110 may receive slot configuration information, determine aslot configuration based on the slot configuration information, andperform communication according to the determined slot configuration.

Next, the communication module 120 may be an integrated module thatperforms wireless communication using a wireless communication networkand a wireless LAN access using a wireless LAN. For this, thecommunication module 120 may include a plurality of network interfacecards (NICs) such as cellular communication interface cards 121 and 122and an unlicensed band communication interface card 123 in an internalor external form. In the drawing, the communication module 120 is shownas an integral integration module, but unlike the drawing, each networkinterface card can be independently arranged according to a circuitconfiguration or usage.

The cellular communication interface card 121 may transmit or receive aradio signal with at least one of the base station 200, an externaldevice, and a server by using a mobile communication network and providea cellular communication service in a first frequency band based on theinstructions from the processor 110. According to an embodiment, thecellular communication interface card 121 may include at least one NICmodule using a frequency band of less than 6 GHz. At least one NICmodule of the cellular communication interface card 121 mayindependently perform cellular communication with at least one of thebase station 200, an external device, and a server in accordance withcellular communication standards or protocols in the frequency bandsbelow 6 GHz supported by the corresponding NIC module.

The cellular communication interface card 122 may transmit or receive aradio signal with at least one of the base station 200, an externaldevice, and a server by using a mobile communication network and providea cellular communication service in a second frequency band based on theinstructions from the processor 110. According to an embodiment, thecellular communication interface card 122 may include at least one NICmodule using a frequency band of more than 6 GHz. At least one NICmodule of the cellular communication interface card 122 mayindependently perform cellular communication with at least one of thebase station 200, an external device, and a server in accordance withcellular communication standards or protocols in the frequency bands of6 GHz or more supported by the corresponding NIC module.

The unlicensed band communication interface card 123 transmits orreceives a radio signal with at least one of the base station 200, anexternal device, and a server by using a third frequency band which isan unlicensed band, and provides an unlicensed band communicationservice based on the instructions from the processor 110. The unlicensedband communication interface card 123 may include at least one NICmodule using an unlicensed band. For example, the unlicensed band may bea band of 2.4 GHz or 5 GHz. At least one NIC module of the unlicensedband communication interface card 123 may independently or dependentlyperform wireless communication with at least one of the base station200, an external device, and a server according to the unlicensed bandcommunication standard or protocol of the frequency band supported bythe corresponding NIC module.

The memory 130 stores a control program used in the UE 100 and variouskinds of data therefor. Such a control program may include a prescribedprogram required for performing wireless communication with at least oneamong the base station 200, an external device, and a server.

Next, the user interface 140 includes various kinds of input/outputmeans provided in the UE 100. In other words, the user interface 140 mayreceive a user input using various input means, and the processor 110may control the UE 100 based on the received user input. In addition,the user interface 140 may perform an output based on instructions fromthe processor 110 using various kinds of output means.

Next, the display unit 150 outputs various images on a display screen.The display unit 150 may output various display objects such as contentexecuted by the processor 110 or a user interface based on controlinstructions from the processor 110.

In addition, the base station 200 according to an embodiment of thepresent disclosure may include a processor 210, a communication module220, and a memory 230.

First, the processor 210 may execute various instructions or programs,and process internal data of the base station 200. In addition, theprocessor 210 may control the entire operations of units in the basestation 200, and control data transmission and reception between theunits. Here, the processor 210 may be configured to perform operationsaccording to embodiments described in the present disclosure. Forexample, the processor 210 may signal slot configuration and performcommunication according to the signaled slot configuration.

Next, the communication module 220 may be an integrated module thatperforms wireless communication using a wireless communication networkand a wireless LAN access using a wireless LAN. For this, thecommunication module 120 may include a plurality of network interfacecards such as cellular communication interface cards 221 and 222 and anunlicensed band communication interface card 223 in an internal orexternal form. In the drawing, the communication module 220 is shown asan integral integration module, but unlike the drawing, each networkinterface card can be independently arranged according to a circuitconfiguration or usage.

The cellular communication interface card 221 may transmit or receive aradio signal with at least one of the base station 100, an externaldevice, and a server by using a mobile communication network and providea cellular communication service in the first frequency band based onthe instructions from the processor 210. According to an embodiment, thecellular communication interface card 221 may include at least one NICmodule using a frequency band of less than 6 GHz. The at least one NICmodule of the cellular communication interface card 221 mayindependently perform cellular communication with at least one of thebase station 100, an external device, and a server in accordance withthe cellular communication standards or protocols in the frequency bandsless than 6 GHz supported by the corresponding NIC module.

The cellular communication interface card 222 may transmit or receive aradio signal with at least one of the base station 100, an externaldevice, and a server by using a mobile communication network and providea cellular communication service in the second frequency band based onthe instructions from the processor 210. According to an embodiment, thecellular communication interface card 222 may include at least one NICmodule using a frequency band of 6 GHz or more. The at least one NICmodule of the cellular communication interface card 222 mayindependently perform cellular communication with at least one of thebase station 100, an external device, and a server in accordance withthe cellular communication standards or protocols in the frequency bands6 GHz or more supported by the corresponding NIC module.

The unlicensed band communication interface card 223 transmits orreceives a radio signal with at least one of the base station 100, anexternal device, and a server by using the third frequency band which isan unlicensed band, and provides an unlicensed band communicationservice based on the instructions from the processor 210. The unlicensedband communication interface card 223 may include at least one NICmodule using an unlicensed band. For example, the unlicensed band may bea band of 2.4 GHz or 5 GHz. At least one NIC module of the unlicensedband communication interface card 223 may independently or dependentlyperform wireless communication with at least one of the base station100, an external device, and a server according to the unlicensed bandcommunication standards or protocols of the frequency band supported bythe corresponding NIC module.

FIG. 11 is a block diagram illustrating the UE 100 and the base station200 according to an embodiment of the present disclosure, and blocksseparately shown are logically divided elements of a device.Accordingly, the aforementioned elements of the device may be mounted ina single chip or a plurality of chips according to the design of thedevice. In addition, a part of the configuration of the UE 100, forexample, a user interface 140, a display unit 150 and the like may beselectively provided in the UE 100. In addition, the user interface 140,the display unit 150 and the like may be additionally provided in thebase station 200, if necessary.

In an NR system, a PUCCH may be divided into a long PUCCH and a shortPUCCH according a PUCCH format. Here, the symbol period of the longPUCCH may be longer than that of the short PUCCH. For example, the longPUCCH means a PUCCH format composed of 4 or more OFDM symbols. Inaddition, among the aforementioned PUCCH formats, PUCCH formats 1, 3,and 4 belong thereto. In addition, the short PUCCH means a PUCCH formatcomposed of two or smaller OFDM symbols. Among the aforementioned PUCCHformats, PUCCH formats 0 and 2 belong thereto.

According to an embodiment, the short PUCCH may have one or two symbolperiods. In addition, in the short PUCCH, a PUCCH format having 1 RBsize (i.e. 12 REs) for each one symbol is referred to as PUCCH format 0.In addition, in the short PUCCH, a PUCCH format having one RB to 16 RBsfor each one symbol is referred to as PUCCH format 2. For the shortPUCCH having two symbol periods, transmission may be performed indifferent manners using different short PUCCH formats according to a bitsize of UCI to be transmitted by the UE. For example, the UCI to betransmitted by the UE may be repeatedly transmitted at each symbolduring the two symbol periods in which the short PUCCH is transmitted.Alternatively, different pieces of UCI may be respectively transmittedat the two symbol periods in which the short PUCCH is transmitted. Inthis case, it may be configured so that the UE transmits time-sensitiveinformation in a second symbol period between the two symbol periods inwhich the short PUCCH is transmitted, and transmits non-time-sensitiveinformation in a first symbol period between the two symbol periods.Through this, a processing time in the UE may be ensured for thetime-sensitive information. Hereinafter, for convenience of description,the short PUCCH having one symbol will be basically described, but thepresent disclosure is not limited thereto. Embodiments pertaining to ashort PUCCH to be described hereinafter may also be identically orcorrespondingly applied to the short PUCCH composed of two symbols. Theconfiguration of a time resource and a frequency resource to which aPUCCH is allocated may vary according to a PUCCH format.

FIG. 12 illustrates an example of a sequence-based short PUCCH formataccording to an embodiment of the present disclosure. Here, thesequence-base short PUCCH format may be a PUCCH format in which theaforementioned base sequence is cyclic shifted (CS) to transmitdifference pieces of information. In an NR system, the sequence-basedshort PUCCH format may be the aforementioned PUCCH format 0 throughTable 3. Hereinafter, unless described otherwise herein, the sequenceindicates the base sequence itself or a sequence cyclic-shifted from thebase sequence, which is used in the sequence-based short PUCCH format.

In FIG. 12, an x-axis denotes a plurality of subcarriers in a frequencydomain, and a y-axis denotes a symbol in a time domain. For example, thesequence-based short PUCCH format may be allocated to a resourceincluding a plurality of REs. In detail, the sequence-based short PUCCHformat is composed of one or consecutive two symbols (time resource),and a resource composed of a plurality of consecutive subcarriers(frequency resource) may be allocated to each symbol. Here, the numberof the plurality of consecutive subcarriers may be obtained bymultiplying the number of RBs by the number of subcarriers for each RB.For example, the number of the plurality of consecutive subcarriers maybe the number that one RB has. In addition, one RB may be 12subcarriers. For the sequence-based short PUCCH format, a PUCCH resourcemay include 12 subcarriers for each symbol.

FIG. 13 illustrates an example of a frequency division multiplexing(FDM)-based short PUCCH format in an NR system according to anembodiment of the present disclosure. Here, the FDM-based short PUCCHformat may be a PUCCH format which is distinguished by subcarriers of areference signal (RS) and UCI. For example, in the NR system, theFDM-based short PUCCH format may be the aforementioned PUCCH format 2.Here, the plurality of subcarriers forming the FDM-based short PUCCHformat may be mapped to each of the UCI and the RS according to a presetratio. For example, the RS may be mapped to subcarriers corresponding to½, ⅓, ¼, or ⅙ of the total number of subcarriers that form the PUCCH.FIG. 13 illustrates a FMD-based short PUCCH format, when an RS overhead,which represents a ratio of RS-occupied subcarriers over the entiresubcarriers, is ½.

In FIG. 13, an x-axis denotes a plurality of subcarriers in a frequencydomain, and a y-axis denotes a symbol in a time domain. In more detail,the FDM-based short PUCCH format is composed of one or two consecutivesymbols (time resource), and a resource composed of a plurality ofconsecutive subcarriers (frequency resource) may be allocated to eachsymbol. Here, the number of the plurality of consecutive subcarriers maybe obtained by multiplying the number of RBs by the number ofsubcarriers for each RB. For example, unlike the aforementionedsequence-based short PUCCH format, the FDM-based short PUCCH format maybe composed of one or more RBs for each symbol. In more detail, for theFDM-based short PUCCH format, a PUCCH resource may include, for eachsymbol, from subcarriers that may be occupied by one RB to subcarriersthat may be occupied by 16 RBs. According to an embodiment of thepresent disclosure, a UE may transmit the UCI using the aforementionedsequence-based short PUCCH format or the FDM-based short PUCCH format.According to an embodiment, the UE may transmit the UCI using anotherPUCCH format according to a payload size of the UCI to be transmitted.For example, when the payload size of the UCI to be transmitted by theUE is 2 or smaller, the UE may transmit the UCI using the sequence-basedshort PUCCH format. In addition, when the payload size of the UCI to betransmitted by the UE exceeds 2, the UE may transmit the UCI using theFDM-based short PUCCH format.

A type of the UCI to be transmitted through the PUCCH may includeHARQ-ACK information, a SR, CSI, a beam failure recovery request (BR),or a combination thereof. The UCI payload may include at least one amongbit(s) representing HARQ-ACK information, an SR bit, a CSI bit or a BRbit. The HARQ-ACK information may also include one or more bits. Inaddition, the UE may also transmit a plurality of pieces of UCI havingdifferent UCI types through one PUCCH. Hereinafter, description will beprovided about a method in which a UE according to an embodiment of thepresent disclosure transmits HARQ-ACK information and UCI other thanHARQ-ACK information through a short PUCCH format. For example, the UEmay transmit request information for indicating a request to betransmitted to the base station and the HARQ-ACK information. Here, therequest information may include at least one of the SR or BR. In thepresent disclosure, the request information may be used as termsindicating the at least one of the SR or BR.

According to an embodiment, when the UE transmits a scheduling request(SR), the UE may transmit the SR using an SR-PUCCH for the SR accordingto the configuration of the base station. The base station may set, tothe UE, a resource for transmitting the SR using the PUCCH through anRRC signal. In other words, the base station may configure, to the UE,an SR-PUCCH resource for SR transmission. The UE may transmit theSR-PUCCH to the base station through the SR-PUCCH resource configured bythe base station. When the UE requests the base station for the resourcefor transmitting a UL-SCH, the UE may transmit the SR using a PUCCHconfigured thereto. For example, the UE may transmit an SR composed of asingle bit through the PUCCH configured based on an RRC signal. In moredetail, when the UE requests a UL-SCH resource, the UE may transmit theSR, which is a positive SR, to the base station. The base stationreceiving the positive SR may schedule the UL-SCH resource to the UEthat has transmitted the positive SR. Here, the SR may be signaledthrough at least one bit. For example, a bit value of the positive SRmay be represented as 1 and a bit value of the negative SR may berepresented as 0. In an embodiment to be described later, an SR forrequesting to schedule the UL-SCH resource may be referred to as apositive SR. In addition, a negative SR may indicate an SR when the UEdoes not request the UL-SCH resource. In addition, when the UE does notrequest the UL-SCH resource, the UE may not transmit the PUCCH through aresource configured with resources for the SR transmission.

Meanwhile, the SR transmission by the UE may overlap HARQ-ACKinformation transmission for downlink data transmission by the basestation on a time axis. For example, a time point at which the UE triesto request a UL-SCH resource may overlap, on a time axis, a time pointwhen the UE tries to transmit the HARQ-ACK information. In this case,the UE may transmit the SR and the HARQ-ACK information simultaneouslyusing the PUCCH. When the SR and the HARQ-ACK information aresimultaneously transmitted using the PUCCH, the UE according to anembodiment of the present disclosure may efficiently transmit the SR andthe HARQ-ACK information through a multiplexing or transmissionmechanism.

For example, the base station may separately configure an SR-PUCCHresource for transmitting the SR and an HARQ-PUCCH resource fortransmitting the HARQ-ACK information. Here, when the UE tires tosimultaneously transmit a positive SR and the HARQ-ACK information, theUE may simultaneously transmit the positive SR and the HARQ-ACKinformation through the SR-PUCCH resource. On the contrary, when the UEtires to simultaneously transmit a negative SR and the HARQ-ACKinformation (or only the HARQ-ACK information), the UE maysimultaneously transmit the negative SR and the HARQ-ACK informationthrough the HARQ-PUCCH resource. Here, the UE may transmit up to 2-bitHARQ-ACK information using the sequence-based short PUCCH format of FIG.12. The base station may detect the SR-PUCCH resource and the HARQ-PUCCHresource to acquire the HARQ-ACK information and information aboutwhether the SR has received.

In addition, according to the configuration of the base station, the UEmay perform transmission using any one between the sequence-based shortPUCCH format and the FDM-based short PUCCH format based on a payloadsize of UCI to be transmitted. For example, the UE may transmit only theSR using the sequence-based short PUCCH format, or only 1 or 2-bitHARQ-ACK information. In addition, the UE may simultaneously transmitthe SR and 2 or more bits of HARQ-ACK information using the FDM-basedshort PUCCH format. Meanwhile, a resource configured based on thesequence-bases short PUCCH format for the SR transmission by the UE maybe multiplexed with SR transmission of another UE. Accordingly, when theUE transmits the SR by means of another resource without using a PUCCHresource for the SR transmission, SR detection performance of the basestation for the SR transmission by another UE may be improved. In moredetail, in a case where the UE transmits the SR on a resource using theFDM-based short PUCCH format, or transmits the SR on a resource forHARQ-ACK transmission, SR detection performance of the base station forthe SR transmission by the other UE may be improved when the basestation detects an SR resource configured to be multiplexed with the SRtransmission of another UE. When the SR and the HARQ-ACK aresimultaneously transmitted, the base station according to an embodimentof the present disclosure may configure the UE to set one PUCCH resourcefor transmission of the SR and HARQ-ACK/NACK. For example, in a slot orsubframe set so that the SR is transmitted according to an SRconfiguration, one PUCCH resource may be configured for transmission ofthe SR and HARQ-ACK/NACK. In this case, the base station may detect onePUCCH resource to obtain the HARQ-ACK information and information aboutwhether the SR has received.

For example, when the number of bits representing the HARQ-ACKinformation exceeds 2, the UE may transmit the SR and the HARQ-ACKinformation using the FDM-based short PUCCH format. In this case,according to the configuration by the base station, the UE may transmitthe SR and the HARQ-ACK information through a PUCCH resource of theFDM-based short PUCCH format. In addition, the UCI to be transmitted bythe UE may have a different type from the SR and HARQ-ACK information,and have three or more bits. Even in this case, the UE may transmit theUCI using the FDM-bases short PUCCH format. The base station mayconfigure the number of bits of HARQ-ACK information to be transmittedby the UE in response to a PDSCH having been transmitted by the basestation. In addition, the base station may detect a PUCCH having beentransmitted from the UE and acquire the HARQ-ACK information and requestinformation based on the set number of bits of the HARQ-ACK information.

Meanwhile, when the UE uses the sequence-based short PUCCH format,PAPR/CM (peak-to-average power ratio/cubic metric) performance may beimproved in comparison to a case of using the FDM-based short PUCCHformat. When the PAPR/CM performance is improved, a wirelesscommunication coverage may be widened. In addition, when the UE uses thesequence-based short PUCCH format, link performance may also be improvedin comparison to a case of using the FDM-based short PUCCH format.Accordingly, the present disclosure may extend a case where a UEtransmits UCI using a sequence-based short PUCCH format. For example,when UCI to be transmitted by the UE includes an SR and 1 or 2-bitHARQ-ACK information, the UE may transmit the UCI through thesequence-based short PUCCH format. The base station may configure the UEto transmit the UCI through the sequence-based short PUCCH format.

According to an embodiment, when transmitting the UCI using thesequence-based short PUCCH format, the UE cyclic-shifts a base sequencebased on the UCI to be transmitted by the UE itself. When using thesequence-based short PUCCH format using 1 RB, the UE maps a sequencecyclic-shifted from the base sequence to 12 REs to transmit the 12 REs.The UE may calculate a phase value indicating a phase difference betweenthe base sequence and the cyclic-shifted sequence based on an initialcyclic shift value (hereinafter, ‘CS initial value’) and a cyclic shiftvalue (hereinafter, ‘CS value’). Here, the CS value may be a valueobtained by quantizing a degree that the base sequence iscyclic-shifted. In addition, the UE may obtain a CS initial valuethrough an upper layer. More specifically, the CS initial value may beset differently for each PUCCH format. Alternatively, the UE may alsoobtain the CS initial value from the base station according to the PUCCHformat. In addition, the phase value a may be expressed as the followingEquation (1). In Equation (1), I may denote a symbol index of a slot inwhich the PUCCH is transmitted. For example, 1=0 denotes a first symbolof the slot in which the PUCCH is transmitted. In addition, I′ denotes asymbol index in the slot. n_(s,f) ^(μ) may denote a slot index in asubframe. In Equation (1), an operator ‘x mod y’ denotes a remainder ofx divided by y, and π denotes the circular constant. N^(RB) _(sc) maydenote the number of subcarriers included in one RB. In addition, c(i)may denote a preset pseudo-random sequence in a wireless communicationsystem. As described above, the UE may calculate the phase value a basedon the CS initial value mo set according to the PUCCH format and the CSvalue m_(cs) determined according to the UCI.

$\begin{matrix}{\alpha_{l} = {\frac{2\pi}{N_{sc}^{RB}}\left( {\left( {m_{0} + m_{cs} + {n_{cs}\left( {n_{s,f}^{\mu},{l + l^{\prime}}} \right)}} \right)\;{mod}\; N_{sc}^{RB}} \right)}} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack\end{matrix}$Here,n _(cs)(n _(s,f) ^(μ) ,l)=Σ_(m=0) ⁷2^(m) c(14·8_(s,f) ^(μ)+8l+m)

Here, the UE may determine the CS value based on UCI to be transmittedby the UE. In addition, the UE may obtain the CS initial value from thebase station. According to an embodiment, the UE may determine the CSvalue for cyclic-shifting the base sequence based on the HARQ-ACKinformation and whether to transmit the SR. For example, the UE maydetermine the CS value based on the HARQ-ACK information and whether theSR is a positive SR indicating SR transmission. The UE may maprespectively, to CS values which are different from each other,combinations of bits indicating whether the SR is the positive SR andHARQ-ACK bits representing the HARQ-ACK information. In addition, the UEmay map respectively the aforementioned bit combinations to sequencesshifted from the base sequence based on the CS values which aredifferent from each other. For example, when the HRAQ-ACK information is1 bit, the combination of the SR bits and the HARQ-ACK bit may be mappedrespectively to 4 CS values. In addition, when the HRAQ-ACK informationis 2 bits, the combination of the SR bits and the HARQ-ACK bits may bemapped respectively to 8 CS values.

For example, when the UE transmits only two-bit HARQ-ACK information,bit sets of ‘00, 01, 10, 11’ may be mapped to 4 CS values which aredifferent from each other and then transmitted. Here, as the intervalbetween the CS values is longer, the detection performance of the basestation may be increased. This is because the phase at which the basesequence is cyclic-shifted varies according to the interval between theCS values. The CS value and the phase value may have a linearrelationship. More specifically, as an interval between any two among aplurality of CS values is longer, the difference in phase at which thebase sequence is cyclic-shifted may become larger. In addition, as thedifference in phase at which the base sequence is cyclic-shifted islarger, the performance for identifying information mapped to thecorresponding CS value may become increased. Each bit set may bereferred to as a state in the present disclosure. In addition, when thenumber of cyclic-shifted sequence identified in one symbol is N, the UEmay transmit N different pieces of information. The UE may determine thenumber of CS values which are different from each other according to thenumber of HARQ-ACK bits. For example, when the number of the HARQ-ACKbits is m, the number of CS values which are different from each othermay be 2{circumflex over ( )}m. In this case, the 2{circumflex over( )}m CS values which are different from each other respectively mappedto 2{circumflex over ( )}m states may be composed of 2{circumflex over( )}m CS values increasing by an identical interval based on thesmallest CS value among the 2{circumflex over ( )}m CS values which aredifferent from each other. Here, the UE may be set so that the identicalinterval is N/(2{circumflex over ( )}m). For example, when N is 12 and mis 2, the interval between any two closest among four CS values mappedto each state may be the constant for each state. In this case, themagnitude of the CS interval indicating the interval between any twoclosest among a plurality of CS values may be 3. In addition, fourcyclic-shift values respectively corresponding to the states may be {0,3, 6, 9}.

According to an embodiment, when the UE simultaneously transmits the SRand the HARQ-ACK information, the UE may maintain the magnitude of theinterval between the CS values identically to a case of transmittingonly the HARQ-ACK information. The UE may set the interval between anytwo closest among the CS values according to the HARQ-ACK information incase of transmitting the SR and the HARQ-ACK information simultaneouslyidentically to the interval between any two closest among the CS valuesaccording to the HARQ-ACK information in case of transmitting only theHARQ-ACK information. For example, when the SR is not a positive SR, thefour CS values respectively corresponding to states according to theHARQ-ACK information may be {0, 3, 6, 9}. In this case, the UE may setthe four CS values according to the HARQ-ACK information when the SR isa positive SR to be {1, 4, 7, 10} or {2, 5, 8, 11}. Through this, the UEmay maintain the detection performance for the HARQ-ACK information.

In more detail, the UE may determine a cyclic shift offset (hereinafter,‘CS offset’) based on whether the SR is a positive SR. For example, whenthe SR is the positive SR, the CS offset may be ‘1’. In addition, whenthe SR is not the positive SR (namely, the SR is a negative SR), the CSoffset may be ‘0’. In addition, the UE may calculate a first cyclicshift value (hereinafter, ‘first CS value’) calculated based on theHARQ-ACK information, and a second CS value indicating a final cyclicshift value based on the CS offset. Next, the UE may cyclic-shift thebase sequence based on the second CS value to generate a cyclic-shiftedsequence. Then, the UE may transmit a PUCCH for simultaneoustransmission of the SR and the HARQ-ACK information based on thegenerated sequence.

A plurality of different first CS values may be ‘0, 3, 6, 9’ accordingto two bit values ‘00, 01, 10, 11’ indicating the HARQ-ACK information.In addition, when the CS offset is ‘0’, the second CS values to be usedfor cyclic-shifting the base sequence may be ‘0, 3, 6, 9’. On thecontrary, when the CS offset is ‘1’, the second CS value to be used forcyclic-shifting the base sequence may be ‘1, 4, 7, 10’ or ‘2, 5, 8, 11’.In this way, the magnitude of the interval between any two closest amonga plurality of different CS values may be maintained as ‘3’ according tothe HARQ-ACK information.

According to an embodiment, when an SR and HARQ-ACK information aresimultaneously transmitted, the UE may set the aforementioned N to alarger value in comparison to the case of transmitting only the HARQ-ACKinformation. For example, the UE may set N to 12 in case of transmittingonly the HARQ-ACK information, and to 16 in case of simultaneouslytransmitting the SR and the HARQ-ACK information. When the HARQ-ACKinformation is two bits and the UE sets N to 16, the magnitude of theinterval between any two closest among four CS values respectivelycorresponding to states may be 4. For example, four CS valuesrespectively corresponding to the states according to the HARQ-ACKinformation may be {0, 4, 8, 12}. In addition, the UE may set a CSoffset based on whether the SR is a positive SR. Here, when the SR isthe positive SR, the UE may set the CS offset to ‘2’, and when the SR isnot the positive SR, may set the CS offset to ‘0’. The UE may set thefour CS values to {0, 4, 8, 12} according to the HARQ-ACK informationwhen the SR is not the positive SR. In addition, the UE may set the fourCS values to {2, 6, 10, 14} according to the HARQ-ACK information whenthe SR is the positive SR. This is because the UE may set the intervalbetween the cyclic shift values longer based on the set N.

According to another embodiment, when an SR and HARQ-ACK information aresimultaneously transmitted, the UE may set N to 8. When the HARQ-ACKinformation is two bits, and the UE sets N to 8, the magnitude betweenany two closest among four CS values respectively corresponding tostates may be 2. For example, the four CS values respectivelycorresponding to the states according to the HARQ-ACK information may be{0, 2, 4, 6}. In addition, the UE may set a CS offset based on whetherthe SR is a positive SR. In this case, when the SR is the positive SR,the UE may set the CS offset to ‘1’, and when the SR is not the positiveSR, set the CS offset to ‘0’. The UE may set the four CS values to (0,2, 4, 6) according to the HARQ-ACK information when the SR is not thepositive SR. In addition, the UE may set the four CS values to {1, 3, 5,7} according to the HARQ-ACK information when the SR is the positive SR.This is because the UE may set the interval between the cyclic shiftvalues longer based on the set N.

Hereinafter, descriptions will be provided to a method in which a UEaccording to an embodiment of the present disclosure transmits an SRthrough a PUCCH. Table 4 shows a method for configuring a PUCCH resourcefor transmitting an SR in a wireless communication system according toan embodiment. The PUCCH resource for transmitting the SR in thewireless communication system may be allocated through RRC signaling.

TABLE 4 SchedulingRequestConfig ::= CHOICE {  release NULL,  setupSEQUENCE {   sr-PUCCH-ResourceIndex INTEGER (0..2047),   sr-ConfigIndexINTEGER (0..157),   dsr-TransMax ENUMERATED {n4, n8, n16, n32, n64,spare3, spare2, spare1}  } } MAC-MainConfig ::= SEQUENCE {  ...  [[sr-ProhibitTimer-r9 INTEGER (0..7) OPTIONAL -- Need ON  ]],  ... }

In Table 4, sr-PUCCH-ResourceIndex denotes a frequency domaintransmission resource index for PUCCH transmission. In addition,sr-configIndex may denote a time domain transmission resource index forthe PUCCH transmission. dsr-TransMax denotes the maximum number of timesof SR transmission. When the SR is triggered in an LTE system, a UE maycalculate an SR periodicity and an SR subframe offset based onsr-configIndex. Next, the UE may transmit the SR through a PUCCHresource corresponding to the calculated SR periodicity and SR subframeoffset. Table 5 represents a method for calculating, by the UE, the SRperiodicity and SR subframe offset based on sr-configIndex.

According to an embodiment, when an uplink resource is not configuredfrom the base station, the UE may retransmit an SR based on an SRperiodicity up to the maximum number of times of SR transmission,dsr-TransMax. Even after the UE transmits SRs corresponding to themaximum number of times of SR transmission, the uplink resource may notbe configured. In this case, the UE may release a scheduling request forthe uplink resource, and perform a random access procedure.

TABLE 5 SR configuration Index SR periodicity (ms) SR subframe offsetI_(SR) SR_(PERIODICITY) N_(OFFSET, SR) 0-4 5 I_(SR)  5-14 10 I_(SR) − 5 15-34 20 I_(SR) − 15 35-74 40 I_(SR) − 35  75-154 80 I_(SR) − 75 155-1562 I_(SR) − 155 157 1 I_(SR) − 157

In addition, the UE may set an SR transmission prohibit timer usingsr-ProhibitTimer-r9 of MAC-MainConfig of Table 4 in order to preventunnecessary SR transmission. When the SR transmission prohibit timer isset, the UE may not transmit the SR until the SR transmission prohibittimer expires. For example, the value of sr-ProhibitTimer-r9 may be anyone among 0 to 7. When the value of sr-ProhibitTimer-r9 is ‘2’, the UEmay not transmit the SR during double the time of an SR period. Inaddition, the value of sr-ProhibitTimer-r9 is ‘0’ may indicate a casewhere there is not the SR transmission prevention timer.

Meanwhile, according to the aforementioned embodiment, the UE maytransmit an SR together with HARQ-ACK information through one PUCCHresource. Through this, the base station may detect a one PUCCH resourceto recognize the SR and the HARQ-ACK information from the UE. In a 3GPPNR system, the UE may use a short PUCCH format to transmit UCIrepresented with 3 bits or more. In this case, the short PUCCH formatmay be an FDM-based PUCCH format described through FIG. 13. In addition,the UE may use a short PUCCH format to transmit UCI represented with 2bit or less. Here, the short PUCCH format may be a sequence-based shortPUCCH format described through FIG. 12.

According to an embodiment, when HARQ-ACK information and an SR aremultiplexed in a PUCCH, mapping may be performed to different sequencesas in Tables 6 and 7. Tables 6 and 7 respectively show a mappingrelationship between information and a sequence, when the HARQ-ACKinformation is expressed with 1 bit and 2 bits.

TABLE 6 HARQ-ACK HARQ-ACK with simultaneous SR opportunity simultaneousSR opportunity Sequence #1 Sequence #2 Sequence #1 Sequence #2 Sequence#3 ACK NACK ACK + ACK + NACK + negative SR positive SR positive SR

TABLE 7 2-bit HARQ-ACK in slots without 2-bit HARQ-ACK in slots withsimultaneous simultaneous SR opportunity SR opportunity Seq. #1 Seq. #2Seq. #3 Seq. #4 Seq. #1 Seq. #2 Seq. #3 Seq. #4 Seq. #5 positive SR +NACK, NACK ACK, ACK, NACK, NACK, ACK, ACK, NACK, ACK, positive SR + ACKNACK ACK NACK ACK + NACK + ACK + ACK + ACK, negative SR negative SRnegative SR positive SR NACK positive SR + NACK, ACK

The aforementioned embodiments exemplarily describe a case where the SRand the HARQ-ACK are simultaneously transmitted, but the aforementionedembodiments may also be identically or correspondingly applied to a casewhere a BR and HARQ-ACK information are simultaneously transmitted. Inaddition, when it is necessary to simultaneously transmit the SR, theBR, and the HARQ-ACK information, and the priority of the BR is higherthan that of the SR, the aforementioned embodiments may be applied as inthe case where the BR and the HARQ-ACK information are simultaneouslytransmitted. The priorities of the SR and the BR will be described morespecifically through embodiments to be described later.

Meanwhile, in a wireless communication system using an mmWave band, itis necessary to secure a signal arrival distance through beamforming.For wireless communication through the mmWave band, the transmissioncoverage is limited by a large power loss caused by the attenuation of aradio wave. Accordingly, a base station and a UE in an NR system usingthe mmWave band may configure an optimal transmission and reception beampair between the base station and the UE. For example, the base stationand the UE may signal beam-related information for periodically matchingthe directions of the transmission and reception beams to set theoptimal beam pair. The UE may report, to the base station, thebeam-related information measured based on signals transmitted andreceived through beams. Here, the beam-related information may includeat least one among the number of supported beams, the number of beamsweeping resources, beam resource locations, and a beam sweeping period.In addition, operations for the base station and UE configuring andmaintaining the beam pair may be referred to as a beam managementtechnique.

When a beam is used for transmitting and signaling a signal in awireless communication system according to an embodiment of the presentdisclosure, the UE may sense beam failure. Here, the beam failure mayrepresent performance reduction or a link loss in signal transmissionand reception through beams. When sensing the beam failure, the UE mayperform a beam failure recovery mechanism. For example, after sensingthe beam failure, the UE may identify a new candidate beam based on acandidate beam reference signal received from the base station. In thiscase, the candidate beam reference signal may include a periodic CSI-RSfor beam management. Alternatively, the UE may measure beam link qualitythrough at least one among a periodic CSI-RS or an SS and SS/PBCH blocksof the candidate beam reference signal. Then, the UE may transmit a beamrecovery request BR to the base station. Here, the BR for requestingbeam recovery may be referred to as a positive BR. A case in which theUE does not transmit the BR in embodiments to the described later may bereferred to as a negative BR. In addition, the UE may monitor a searchspace configured to the UE in order to receive a control channeltransmitted from the base station. In addition, the UE may receive aresponse from the base station for a beam failure recovery requesthaving been transmitted by the UE. In this case, a beam failure recoverymechanism may be executed by transmitting the beam coverage requestthrough a non-contention based access procedure through a physicalrandom access channel (non-contention based RA) or a PUCCH. According toan embodiment of the present disclosure, a BR format in the beam-relatedinformation may be transmitted using a short PUCCH. In this case, a BRmay be transmitted simultaneously with at least one of theaforementioned SR and HARQ-ACK information. For example, the BR may bemultiplexed with at least one of the SR or the HARQ-ACK information.Hereinafter, description will be provided more specifically about amethod for a UE according to an embodiment of the present disclosure totransmit the BR and the SR with reference to Tables 8 to 12. In Tables 8and 12, parameter names and parameter value based on a 3GPP LTE systemare used for convenience of description, but the present disclosure isnot limited thereto.

According to an embodiment of the present disclosure, a UE may configureone common PUCCH resource for transmitting an SR and a BR. A basestation may configure one common PUCCH resource for transmission of theSR and BR by the UE. Table 8 shows a method for configuring a PUCCHresource for the SR and the BR according to an embodiment of the presentdisclosure. In Table 8, srbr-PUCCH-ResourceIndex denotes a frequencydomain index of the PUCCH resource for the SR and the BR, andsrbr-ConfigIndex denotes a time domain index of the PUCCH resource forthe SR and the BR. In addition, dsr-TransMax denotes the maximum numberof times of SR transmission, and br-TransMax denotes the maximum numbertimes of BR transmission. Here, Values which are haven by dsr-TransMaxand br-TransMax may be the same each other. In addition, the UE may seta BR timer (br-Timer) representing a time at which BR retransmission ispossible.

Unlike a prohibit timer in an LTE SR, in an NR BR, the UE sets thebr-Timer for restricting a valid operation time of a BR besides themaximum number of times of retransmission. The corresponding parametermay represent allowance of the BR retransmission by an offset indicatedby the br-Timer based on a slot (or a subframe) at a reference time. Asan embodiment, the reference time of the br-Timer is set to a slot (or asubframe) in which a first BR is transmitted, and when an offset valueis a value of units of a slot (or a subframe), a BR transmittable timelimit is generated according to an offset range in the example of Table5. For example, when the br-Timer is 3, the UE may retransmit the BRfrom the first transmission BR slot (or subframe) to a third slot (orsubframe). The corresponding br-Timer value is not limited to theoffset, and may be modified in various types for representing timeinformation. For example, when the br-Timer is set as an index and has avalue from 1 to 4, a BR timer value corresponding to each index may beset. In addition, when corresponding information is transmitted to theUE through the RRC signal, the UE may operate a BR timer based oncorresponding information. Both or one of the corresponding maximumtransmission times and the BR timer may be used for the BR transmission.Table 8 shows that the maximum number of times of transmission for theBR and a BR timer parameter are included in messages which are differentfrom each other, but the messages may be the same each other.

The UE may retransmit the BR from an index of a subframe (or slot)indicating a reference time to an index of a subframe (or slot)indicated by the BR timer. According to an embodiment, the referencetime at which the BR timer operates may be a subframe (or slot) in whichthe BR is first transmitted. In addition, an offset time represented bythe BR timer may be a value of units of a subframe (or slot). Forexample, when the BR timer indicates ‘3’, the BR may be retransmitted upto a third frame (or slot) following the subframe (or slot) in which theBR is transmitted first. In this case, a method that the BR timerrepresents a time at which the BR retransmission is possible is notlimited to the aforementioned method for representing an offset time.

TABLE 8 SchedulingBeamRecoveryRequestConfig ::= CHOICE {  release NULL, setup SEQUENCE {    srbr-PUCCH-ResourceIndex INTEGER (0..2047),   srbr-ConfigIndex INTEGER (0..157),    dsr-TransMax ENUMERATED {n4,n8, n16, n32, n64, spare3, spare2, spare1}    br-TransMax ENUMERATED{n4, n8, n16, n32, n64, spare3, spare2, spare1}  } } MAC-MainConfig ::=SEQUENCE {  ...  [[ sr-ProhibitTimer-r9 INTEGER (0..7) OPTIONAL -- NeedON   br-Timer INTEGER (0,...,7) OPTIONAL -- Need ON  ]],  ... }

When a common PUCCH resource is configured for transmitting the SR andBR, the base station may determine whether at least one of the SR andthe BR is included therein through PUCCH detection from one PUCCHresource. In this case, the base station determines whether the PUCCHfor the SR and BR includes the SR, the BR, or both the SR and BR basedon the sequence. Table 9 shows a method in which the SR and the BR aremultiplexed based on a sequence. The UE may determine a sequence to beused for transmission of the PUCCH for the SR and BR based on at leastone of the SR and BR. As in Table 9, the UE may transmit the PUCCH forthe SR and BR using different sequences according to the SR and BR. Forexample, when transmitting only the SR, the UE may transmit the PUCCHusing Seq. #1. In addition, when transmitting only the BR, the UE maytransmit the PUCCH using Seq. #2. In addition, when transmitting the SRand BR simultaneously, the UE may transmit the PUCCH using Seq. #3. Inaddition, when the SR or BR transmission is not necessary, (i.e. whenboth the SR and BR are not transmitted), the UE may not transmit thePUCCH through a PUCCH resource configured to transmit the SR and BR.Through this, the UE may transmit the SR and BR using three sequenceswhich are different from each other.

In this case, the sequences may include at least one among 1-RBsequence, 2-RB sequence or a Zadoff-Chu sequence according to the lengthof a sequence supported in a PUCCH format. In addition, the UE maygenerate different sequences using different base sequences identifiedthrough a root index. Alternatively, the UE may generate differentsequences by cyclic-shifting one base sequence based on cyclic shiftvalues. In addition, the UE may transmit the PUCCH for the SR and BRusing a sequence determined based on cross-correlation orautocorrelation performance.

In addition, the UE may distinguishes states from each other byallocating sequences, which are cyclic-shifted from the same basesequence based on the different cyclic-shift values, to No Transmission,only SR transmission, only BR transmission, and transmission of both SRand BR. No Transmission may be defined as no signal transmitted withoutsequence allocation.

TABLE 9 Seq. #1 Seq. #2 Seq. #3 SR only BR only SR + BR

According to an embodiment, the UE may transmit a PUCCH for the SR andBR using a punctured sequence based on a puncturing pattern. In thiscase, the base station may determine whether the PUCCH for the SR and BRincludes the SR, the BR, or the SR and BR based on the sequence. In moredetail, the base station may identify information included in the PUCCHthrough energy detection according to the puncturing pattern. In thiscase, the UE may puncture one sequence differently according to whetherthe SR and BR are transmitted and transmit PUCCHs for the SR and BR.Table 10 shows a method in which the SR and BR are multiplexed based onthe puncturing pattern. In more detail, when only the SR is transmitted,the UE may puncture REs according to a first puncturing pattern in aPUCCH resource in which the sequence is to be transmitted, and transmitthe sequence. In addition, when only the BR is transmitted, the UE maypuncture REs according to a second puncturing pattern in the PUCCHresource in which the sequence is to be transmitted, and transmit thePUCCH. In this case, the first puncturing pattern may be different fromthe second puncturing pattern. In addition, when the SR and BR aretransmitted simultaneously, the UE may transmit a sequence notpunctured.

TABLE 10 Sequence with puncturing Sequence with puncturing Sequence withpattern 1 pattern 2 no puncturing SR only BR only SR + BR

Unlike Table 10, whether the PUCCH for the SR and BR includes ‘SR’,‘BR’, or ‘SR and BR’ may be distinguished based on two or moredifference sequences and puncturing patterns. Table 11 shows a method inwhich the SR and BR are multiplexed based on two sequences and onepuncturing pattern. Like Table 11, when transmitting only the BR or boththe SR and BR, the UE may transmit the same using different sequences.In addition, when transmitting only the SR, the UE may not carry asignal on a specific RC by applying a puncturing pattern to Seq. #1 usedfor the BR transmission.

TABLE 11 Seq. #1 with Seq. #1 with Seq. #2 with puncturing pattern nopuncturing no puncturing SR only BR only SR + BR

Other than Tables 9 to 11, the present disclosure includes variousmethods for distinguishing the SR from the BR and for multiplexing theSR and BR, which can be composed with the number of Seq. usages, thenumber of puncturing patterns, and combinations thereof.

In addition, when the SR and BR to be transmitted by the UE overlap in aspecific slot, the UE may prioritize the SR or BR at the time ofmultiplexing the SR and BR, and transmit a corresponding sequence usinga corresponding PUCCH only for indication for the SR or BR. Thereafter,the UE may transmit request information about the lower priority throughanother resource. For the priorities of the SR and BR, the priority ofthe BR may be set higher. In this case, after sequence transmission forthe BR, a beam failure recovery mechanism operates. The SR istransmitted through a UL channel (namely, a PUCCH or a PUSCH) generatedin this case, and a delay for the SR may be reduced. On the contrary,for the priorities of the SR and BR, the priority of the SR may be sethigher. In this case, PUCCH or PUSCH transmission may occur after the SRtransmission. Here, the UE may transmit the BR through a correspondingchannel to reduce delay for the BR.

According to another embodiment of the present disclosure, PUCCHresources for the respective SR and BR may be independently configuredfor the SR and BR. Table 12 shows a configuration of a PUCCH resourcefor the BR according to an embodiment of the present disclosure.

When a PUCCH resource is allocated so as not to overlap or is allowed tooverlap, the SR and BR may be composed independently. Table 12 shows thestructure of a configuration for PUCCH resource allocation of the SR andBR. For convenience for explanation, the SR composition is assumed tooperate identically to the LTE. In this case, Table 12 shows a messagestructure in which only parameters corresponding to the BR among aplurality of parameters are included in the configuration. In theexample of Table 12, descriptions about the parameters are the same asthose in Table 8.

TABLE 12 SchedulingBeamRecoveryRequestConfig ::= CHOICE {  release NULL, setup SEQUENCE {   br-PUCCH-ResourceIndex INTEGER (0..2047),  br-ConfigIndex INTEGER (0..157),   br-TransMax ENUMERATED {n4, n8,n16, n32, n64, spare3, spare2, spare1}  } } MAC-MainConfig ::= SEQUENCE{  ...  [[ br-Timer INTEGER (0,..7) OPTIONAL -- Need ON  ]],  ... }

According to an embodiment, the UE may configure a separate PUCCHresource for each transmission of the SR and BR. Here, an SR-PUCCHresource for the SR transmission and a BR-PUCCH resource for the BRtransmission may be configured not to overlap in a time domain orfrequency domain. In this case, the base station may detect thecorresponding PUCCH resource to determine whether the SR or BR has beenreceived.

Meanwhile, even when the SR-PUCCH resource and the BR-PUCCH resource areindependent from each other, respective PUCCHs for the SR and BR may beallocated to a single resource in a region in which the correspondinguplink control channel is transmitted. In this case, the UE may transmitonly a single PUCCH in the corresponding region. In this case, the UEmay transmit a PUCCH for multiplexed SR and BR. For example, the UE maytransmit the PUCCH for the SR or the PUCCH for the BR using differentsequences respectively corresponding to the SR and BR. In addition, whenthe SR and BR are simultaneously transmitted, the UE may use thesequence corresponding to the BR to transmit the PUCCH for themultiplexed SR and BR through the SR-PUCCH resource. In addition, the UEmay use the sequence corresponding to the SR to transmit the PUCCH forthe multiplexed SR and BR through the BR-PUCCH resource.

Alternatively, the UE may use a puncturing pattern corresponding to anyone of the SR and BR to transmit the PUCCH for the SR or the PUCCH forthe BR based on a sequence punctured from the base sequence. Forexample, the base station may configure the puncturing patterncorresponding to the SR. In this case, the UE may puncture the basesequence based on the puncturing sequence corresponding to the SR. Inaddition, the UE may use the punctured sequence to transmit the PUCCHfor the SR. In addition, the UE may use the base sequence, which is notpunctured, to transmit the PUCCH for the BR. When the SR and BR aresimultaneously transmitted, the UE may use the base sequence to transmitthe PUCCH for the multiplexed SR and BR through the SR-PUCCH resource.Alternatively, the UE may use the punctured sequence to transmit thePUCCH for the multiplexed SR and BR through the SR-PUCCH resource.

On the contrary, the base station may configure the puncturing patterncorresponding to the BR. In this case, the UE may puncture the basesequence based on the puncturing sequence corresponding to the BR. Inaddition, the UE may use the punctured sequence to transmit the PUCCHfor the BR. Furthermore, the UE may use the base sequence, which is notpunctured, to transmit the PUCCH for the SR. When the SR and BR aresimultaneously transmitted, the UE may use the base sequence to transmitthe PUCCH for the multiplexed SR and BR through the BR-PUCCH resource.Alternatively, the UE may use the punctured sequence to transmit thePUCCH for the multiplexed SR and BR through the SR-PUCCH resource.

Meanwhile, the aforementioned SR-PUCCH resource and BR-PUCCH resourcemay overlap in a time domain and a frequency domain. For example, theSR-PUCCH resource and the BR-PUCCH resource may overlap in the timedomain. In a state where the transmission for the SR and the BR isnecessary, the UE may transmit any one between a PUCCH for the SR and aPUCCH for the BR based on the priority of each of the SR and BR.Alternatively, when a single PUCCH resource is configured for the SR andBR is, the UE may transmit any one of the SR and BR through the PUCCHresources for the SR and BR. In this case, when detecting a PUCCHthrough the PUCCH resource for the SR and BR, the base station maydetermine that a request having a higher priority between the SR and BRhas been received. The base station may perform subsequent operations onthe request of the higher priority between the SR and BR. Next, the UEmay transmit the other one between the SR and BR through a resourcecapable of transmitting an uplink among subsequent resources.

In more detail, the UE may set the priority of the BR higher than thatof the SR. Since the BR is a request to be transmitted when a link islost, the UE may prioritize the BR in comparison to the request forscheduling. In a state where the transmission of the SR and BR isnecessary, the UE may transmit the BR through the PUCCH resource or theBR-PUCCH resource configured for the SR and BR. Then, the UE maytransmit the SR through the subsequent PUCCH resource or PUSCH resource.In this case, the subsequent PUCCH resource or PUSCH resource may be aresource allocated by the base station through the higher priorityrequest, BR. Through this, the UE may reduce delay for the SRtransmission. On the contrary, the UE may set the priority of the SRhigher than that of the BR. In this case, the UE may transmit the BRthrough the SR-PUCCH resource or the PUCCH resource configured for theSR and BR. Then, the UE may transmit the BR through the subsequent PUCCHresource or PUSCH resource. Through this, the UE may reduce delay forthe BR transmission.

For the SR and BR transmission, the base station may use an RRC signalto semi-statically configure a PUCCH transmission resource. It isbecause it is difficult for the base station to predict a time fortransmitting the corresponding request. On the other hand, for HARQ-ACKinformation, the base station uses DCI to dynamically configure thePUCCH transmission resource, or to semi-statically configure the PUCCHtransmission resource using the RRC signal. It is because the HARQ-ACKinformation is a response to downlink transmission from the basestation. The base station may be aware of a transmission time of theHARQ-ACK information. Hereinafter, descriptions will be provided morespecifically about a method for a UE according to an embodiment of thepresent disclosure transmitting the SR, the BR and the HARQ-ACK withreference to Tables 13 to 18.

According to an embodiment of the present disclosure, the UE maysimultaneously transmit the SR, the BR and the HARQ-ACK informationusing a PUCCH. In this case, the UE may multiplex the SR, the BR and theHARQ-ACK information. In addition, the UE may use a single PUCCH tosimultaneously transmit the multiplexed SR, BR, and HARQ-ACKinformation. The UE may multiplex the SR, the BR, and the HARQ-ACKinformation based on sequences allocated to transmit the SR, the BR, andthe HARQ-ACK information. In addition, the UE may multiplex the SR, theBR, and HARQ-ACK information based on PUCCH resources configured totransmit the SR, the BR, and the HARQ-ACK information. Alternatively,the UE may simultaneously transmit one or two among the SR, the BR, andthe HARQ-ACK information based on respective priorities of the SR, theBR and the HARQ-ACK information. Hereinafter, for convenience ofdescription, a transmission method in which the HARQ-ACK information isrepresented with 1 bit is described, but the present disclosure is notlimited thereto. Even when the HARQ-ACK information is represented with2 bits, the transmission method described below will be identically orcorrespondingly applied. More specifically, the HARQ-ACK information maybe classified into ACK and NACK. In addition, the SR is classified intoa positive SR and a negative SR. In addition, the BR is classified intoa positive BR and a negative BR.

According to an embodiment, the base station may configure 3 PUCCHresources for each transmission of the SR, the BR, and the HARQ-ACKinformation. In other words, when allocated with three PUCCH resourceswhich are different from each other, the UE may simultaneously transmitthe SR, the BR and the HARQ-ACK information through the PUCCH usingthree sequences which are different from each other. Here, the threePUCCH resources may be represented with resource 1, resource 2, andresource 3. In addition, the three sequences may be represented withseq. #1, seq. #2, and seq. #3. Table 13 shows sequences and PUCCHresources mapped to respective states, when one bit HARQ-ACKinformation, the SR, and the BR are multiplexed using the three PUCCHresources and the three sequences. In Table 13, when the HARQ-ACKinformation is NACK and is ‘NACK only’ that the SR and BR are nottransmitted, the UE may not transmit the PUCCH. In addition, the UE mayuse the puncturing pattern described in Tables 10 and 11 to distinguishthe states in Table 13 from each other. For example, when one basesequence is used, the UE may distinguish the states in Table 13 based ontwo puncturing patterns.

TABLE 13 Combination of sequence States and PUCCH resource ACK only Seq.#1 + resource 1 ACK + SR Seq. #1 + resource 2 ACK + BR Seq. #1 +resource 3 ACK + SR + BR Seq. #3 + resource 1 NACK only Seq. #2 +resource 1 or no transmission NACK + SR Seq. #2 + resource 2 NACK + BRSeq. #2 + resource 3 NACK + SR + BR Seq. #3 + resource 2 or Seq. #3 +resource 3

According to an embodiment, the UE may transmit the SR, the BR, and theHARQ-ACK information through a single PUCCH resource for transmittingany two among the SR, the BR, and the HARQ-ACK information and anotherPUCCH resource for transmitting the remained one. The base station mayconfigure the PUCCH resource for transmitting any two among the SR, theBR, and the HARQ-ACK information and the other PUCCH resource fortransmitting the remained one. In other words, when the UE is allocatedwith two different PUCCH resources, the base station may configure, forexample, a BR-PUCCH resource for transmitting the BR and oneSR-HARQ-PUCCH resource for transmitting the SR and HARQ-ACK information.In this case, the UE may use four different sequences to transmit theSR, the BR and the HARQ-ACK information through the PUCCH. Here, the twodifferent PUCCH resources may be represented with resource 1, andresource 2. In addition, the four sequences may be represented with seq.#1, seq. #2, seq. #3, seq. #4. Table 14 shows sequences and PUCCHresources mapped to respective states, when one bit HARQ-ACKinformation, the SR, and the BR are multiplexed using the two PUCCHresources and the four sequences.

In Table 14, the PUCCH resource 1 may be configured to a PUCCH resourcefor transmitting the HARQ-ACK information. In addition, PUCCH resource 2may be configured to a PUCCH resource for transmitting the SR and BR.Here, when the UE transmits the PUCCH through resource 1, the basestation may determine that the HARQ-ACK information represents ACK. Inaddition, the base station may distinguish transmissions of ‘a negativeSR and a negative BR’, ‘a positive SR’, ‘a positive BR’, and ‘a positiveSR and a positive BR’ from each other based on a PUCCH sequence detectedfrom resource 1. When the UE transmits a PUCCH through resource 2, thebase station may determine that the HARQ-ACK information indicates NACK.In addition, the base station may distinguish transmission of ‘anegative SR and a negative BR’, ‘a positive SR’, ‘a positive BR’, and ‘apositive SR and a positive BR’ from each other based on a PUCCH sequencedetected from resource 2. In addition, the UE may use the puncturingpattern described in Tables 10 and 11 to distinguish the states in Table14 from each other.

TABLE 14 Combination of sequence States and PUCCH resource ACK only Seq.#1 + resource 1 ACK + SR Seq. #1 + resource 1 ACK + BR Seq. #1 +resource 1 ACK + SR + BR Seq. #3 + resource 1 NACK only Seq. #2 +resource 2 or no transmission NACK + SR Seq. #2 + resource 2 NACK + BRSeq. #2 + resource 2 NACK + SR + BR Seq. #3 + resource 2

Table 15 shows sequences and PUCCH resources mapped to respectivestates, when 2-bit HARQ-ACK information, the SR, and the BR aremultiplexed using the two PUCCH resources and eight sequences. Forexample, one PUCCH resource for transmitting the SR and the BR, and onePUCCH resource for transmitting the HARQ-ACK information may beconfigured. In Table 15, resource 1 may be a PUCCH resource used when afirst bit between the two bit HARQ-ACK information is ACK. In addition,resource 2 may be configured as a PUCCH resource for transmitting the SRand the BR. Here, when the UE transmit the PUCCH through resource 1, thebase station may determine that the first bit between the 2-bit HARQ-ACKinformation indicates ACK. In addition, the base station may determinewhether a second bit between the 2-bit HARQ-ACK information is ACK orNACK, and distinguish transmissions of ‘a negative SR and a negativeBR’, ‘a positive SR’, ‘a positive BR’, and ‘a positive SR and a positiveBR’ from each other based on a PUCCH sequence detected from resource 1.On the contrary, when the UE transmit a PUCCH through resource 2, thebase station may determine that a second bit between the 2-bit HARQ-ACKinformation indicates NACK. In addition, the base station may determinewhether a second bit between the 2-bit HARQ-ACK information is ACK orNACK, and distinguish transmission of ‘a negative SR and a negative BR’,‘a positive SR’, ‘a positive BR’, and ‘a positive SR and a positive BR’from each other based on a PUCCH sequence detected from resource 2. Inaddition, the UE may use the puncturing pattern described in Tables 10and 11 to distinguish the states in Table 15 from each other.

TABLE 15 Combination of sequence States and PUCCH resource (ACK, ACK)only Seq. #1 + resource 1 (ACK, ACK) + SR Seq. #2 + resource 1 (ACK,ACK) + BR Seq. #3 + resource 1 (ACK, ACK) + SR + BR Seq. #4 + resource 1(ACK, NACK) only Seq. #5 + resource 1 or no transmission (ACK, NACK) +SR Seq. #6 + resource 1 (ACK, NACK) + BR Seq. #7 + resource 1 (ACK,NACK) + SR + BR Seq. #8 + resource 1 (NACK, ACK) only Seq. #1 + resource2 (NACK, ACK) + SR Seq. #2 + resource 2 (NACK, ACK) + BR Seq. #3 +resource 2 (NACK, ACK) + SR + BR Seq. #4 + resource 2 (NACK, NACK) +only Seq. #5 + resource 2, or no transmission (NACK, NACK) + SR Seq.#6 + resource 2 (NACK, NACK) + BR Seq. #7 + resource 2 (NACK, NACK) +SR + BR Seq. #8 + resource 2

Meanwhile, unlike Table 15, when 2-bit HARQ-ACK information is bundled,the UE may multiplex the 2-bit HARQ-ACK information, the SR and the BRin the method described through Tables 10, 11 and 13. It is because thatwhen the 2-bit HARQ-ACK information is bundled, the 2-bit HARQ-ACKinformation may be represented with one bit.

According to an embodiment, the base station may configure one PUCCHresource for transmitting the SR, the BR and the HARQ-ACK information.In other words, when the UE is allocated with one PUCCH resource, thebase station may configure, for example, a SR-HARQ-PUCCH resource fortransmitting the BR, the SR and the HARQ-ACK information. In this case,the UE may use eight different sequences to transmit the SR, the BR andthe HARQ-ACK information through the PUCCH. In addition, the eightsequences may be represented with seqs. #1 to #8. Table 16 showssequences and a PUCCH resource mapped to respective states, when 1-bitHARQ-ACK information, the SR, and the BR are multiplexed using the onePUCCH resource and eight sequences. In addition, unlike Table 16, the UEmay use the puncturing pattern described in Tables 10 and 11 todistinguish the states in Table 16 from each other. On the other hand,when the HARQ-ACK information is 2 bits, the UE may use one PUCCHresource and a plurality of sequences to multiplex the 2-bit HARQ-ACKinformation, the SR and the BR. In addition, when the 2-bit HARQ-ACKinformation is bundled, the UE may multiplex the 2-bit HARQ-ACKinformation, the SR and the BR in the same method described in Table 16.

TABLE 16 Combination of sequence States and PUCCH resource ACK only Seq.#1 + resource 1 ACK + SR Seq. #2 + resource 1 ACK + BR Seq. #3 +resource 1 ACK + SR + BR Seq. #4 + resource 1 NACK only Seq. #5 +resource 1 or no transmission NACK + SR Seq. #6 + resource 1 NACK + BRSeq. #7 + resource 1 NACK + SR + BR Seq. #8 + resource 1

According to an embodiment, the UE may transmit a PUCCH for any oneamong the SR, the BR and the HAQRQ-ACK information based on respectivepriorities of the SR, the BR and the HARQ-ACK information. In this case,the UE may use sequences mapped to states to transmit the PUCCH througha PUCCH resource allocated to the states. According to an embodiment,the UE may transmit a PUCCH for any two among the SR, the BR and theHAQRQ-ACK information based on respective priorities of the SR, the BRand the HARQ-ACK information. In this case, the UE may multiplex any twoamong the SR, the BR and the HARQ-ACK information in the aforementionedmultiplexing method for the SR and the BR. Table 17 shows sequences andPUCCH resources mapped to respective states, when one bit HARQ-ACKinformation, the SR, and the BR are transmitted using three PUCCHresources and two sequences. Here, the priority of the SR may beconfigured to be lower than those of the BR and the HARQ-ACKinformation. In addition, the LTE may transmit a PUCCH for the BR andthe HARQ-ACK information based on respective priorities of the SR, theBR and the HARQ-ACK information. In this case, the UE may transmit theSR through the subsequent PUCCH resource or PUSCH resource. Throughthis, the UE may reduce delay for the BR transmission. In addition, theUE may use the puncturing pattern described in Tables 10 and 11 todistinguish the states in Table 17 from each other.

TABLE 17 Combination of sequence States and PUCCH resource ACK only Seq.#1 + resource 1 ACK + SR Seq. #1 + resource 2 ACK + BR Seq. #1 +resource 3 ACK + SR + BR Follow ACK + BR except SR NACK only Seq. #2 +resource 1 or no transmission NACK + SR Seq. #2 + resource 2 NACK + BRSeq. #2 + resource 3 NACK + SR + BR Follow NACK + BR except SR

Table 18 shows a multiplexing method when 2-bit HARQ-ACK information, anSR and a BR are transmitted according to the priorities of the HARQ-ACKinformation, the SR and the BR. As described above, when the 2-bitHARW-ACK information is bundled, the UE may multiplex the 2-bit HARQ-ACKinformation, the SR and the BR in the same method described throughTable 15. When the 2-bit HARQ-ACK information is not bundled, the UE maytransmit a PUCCH for the 2-bit HARQ-ACK information and the BR byapplying the aforementioned method to the multiplexed states to whichthe priorities are applied in Table 18.

TABLE 18 Multiplexed states before Multiplexed states after applyingpriority applying priority (ACK, ACK) + BR + SR (ACK, ACK) + BR (ACK,NACK) + BR + SR (ACK, NACK) + BR (NACK, ACK) + BR + SR (NACK, ACK) + BR(NACK, NACK) + BR + SR (NACK, NACK) + BR

Meanwhile, according to an embodiment of the present disclosure, thebase station may configure a BR-PUCCH resource for transmitting a BR andone SR-HARQ-PUCCH resource for transmitting an SR and HARQ-ACKinformation. For example, the SR and the HARQ-ACK information may bemultiplexed and transmitted through an SR-HARQ-PUCCH resource. In thiscase, the UE may transmit at least any one between the SR and theHARQ-ACK information through the SR-HARQ-PUCCH resource according to theaforementioned method in which the SR and the HARQ-ACK information aresimultaneously transmitted. For example, the UE may multiplex theHARQ-ACK information and the SR in the method described through Table 6(1-bit HARQ-ACK) and Table 7 (2-bit HARQ-ACK).

In addition, when the transmission of at least one between the SR andthe HARQ-ACK information overlaps the BR transmission, the UE may use aPUCCH to simultaneously transmit the BR and at least one between the SRand the HARQ-ACK information. For example, the UE may simultaneouslytransmit the BR and at least one between the SR and the HARQ-ACKinformation through a PUCCH resource used for transmitting the SR andthe HARQ-ACK information between the BR-PUCCH resource and theSR-HARQ-PUCCH resource. Here, the UE may determine one PUCCH resourcebetween the BR-PUCCH resource and SR-HARQ-PUCCH resource as the PUCCHresource used for transmitting the SR and HARQ-ACK information based onwhether the BR is a positive BR. In more detail, when transmitting thepositive BR, the UE may transmit the SR and the HARQ-ACK informationthrough the BR-PUCCH resource. On the contrary, when transmitting anegative BR, the UE may transmit the SR and the HARQ-ACK informationthrough the SR-HARQ-PUCCH resource.

In this case, the base station may detect a PUCCH from the BR-PUCCHresource and the SR-HARQ-PUCCH resource to determine whether the BR hasbeen received. For example, when detecting the SR and HARQ-ACKinformation from the BR-PUCCH resource, the base station may determinethat the positive BR has been received. In addition, the base stationmay acquire the HARQ-ACK information and whether the SR is the positiveSR through a sequence used for transmitting the SR and the HARQ-ACKinformation. On the contrary, when detecting the SR and the HARQ-ACKinformation from the SR-HARQ-PUCCH resource, the base station maydetermine that the negative BR has been received.

A channel selection method for detecting whether a BR has beentransmitted by configuring the BR-PUCCH as a separate resource from theSR-HARQ-PUCCH may be identically applied to various methods capable ofconfiguring to simultaneously transmit the SR and HARQ-ACK informationon a single resource. As an embodiment, when the HARQ-ACK information is1 bit, the UE may simultaneously transmit the SR and the 1-bit HARQ-ACKinformation using four different values cyclic-shifted from a root orbase sequence transmitted through a PUCCH resource. Alternatively, whenthe HARQ-ACK information is 2 bits, the UE may simultaneously transmitthe SR and the 2-bit HARQ-ACK information through eight different valuescyclic-shifted from the root or base sequence transmitted through aPUCCH resource. A method may be applied identically or correspondinglyfor the two aforementioned cases, the method being that the base stationdetermines whether the BR has been transmitted from the UE by means ofchannel selection according to whether the BR has been transmitted.

As described above, since the transmission time of the SR or the BR isdetermined by the UE, it may be difficult for the base station toallocate PUCCH resources using DCI. On the other hand, the base stationmay allocate PUCCH resources through DCI so that the UE reports channelor beam-related information. Here, when the SR (or BR) transmission bythe UE overlaps the PUCCH transmission for reporting, which is allocatedthrough the DCI, the UE may transmit the SR (or BR) through thereporting PUCCH. Specifically, the UE may transmit the SR (or BR) andthe reporting PUCCH through a reporting PUCCH resource allocated throughthe DCI. In addition, the UE may configure 2 bits respectivelyindicating the SR and the BR to transmit the 2 bits through thereporting PUCCH. Table 19 shows bits configured according to the SR andthe BR. In Table 19, SR on/off respectively represent a positive SR anda negative SR. In addition, in Table 19, BR on/off respectivelyrepresent a positive BR and a negative BR.

TABLE 19 SR on SR off BR on 1, 1 1, 0 BR off 0, 1 0, 0

Meanwhile, according to an embodiment, when only 1 bit transmission ispossible through the reporting PUCCH, the UE may transmit requestinformation through the reporting PUCCH, the request informationrepresenting a request for a higher priority between the SR and the BRaccording to the priorities of the SR and BR. In addition, whendetecting a PUCCH through the PUCCH resources for the SR and the BR, thebase station may determine that the information representing a requestfor a higher priority between the SR and the BR has been received. Inthis case, when the information representing the request is 1, the basestation may determine the request to be positive. In addition, when theinformation representing the request is 0, the base station maydetermine the request to be negative. Then, the UE may transmit a lowerpriority request through the subsequent PUCCH resource or PUSCHresource. Through this, the UE may reduce delay for the transmission ofthe lower priority request.

The UE according to an embodiment of the present disclosure maysimultaneously transmit a PUCSH and a PUCCH. Here, the PUCCH may betransmitted using any one among PUCCH formats classified as theaforementioned long PUCCH. Like the existing LTE(-A) system, in an NRsystem, when simultaneous transmission of the PUSCH and the PUCCH isconfigured to the UE in a specific subframe, the UE may simultaneouslytransmit the PUSCH and the PUCCH. For example, the base station mayconfigure the UE to simultaneously transmit the PUSCH and the PUCCH in amanner that whether to simultaneous transmit the PUSCH and the PUCCH isturned on or off through an RRC signal. Here, the UE may transmit thePUSCH and the PUCCH through the same subcarrier or differentsubcarriers. However, when the simultaneous transmission of the PUSCHand the PUCCH is not configured to the UE in a specific subframe, the UEmay transmit UCI only through the PUCCH unless the PUSCH transmission isnot scheduled in the subframe. In this case, when the PUSCH transmissionis scheduled in the subframe, the UE may piggyback UCI to be transmittedthrough the PUCCH on the PUSCH, and then transmit the UCI. This may bealso applied identically or correspondingly to a case in which carriersare aggregated. On the other hand, in the NR system, the UCI may includebeam-related information or beam management information for beamformingthrough a millimeter wave (mmWave).

According to an embodiment of the present disclosure, the UE, which hasreceived an RRC signal in which a PUSCH-PUCCH configuration parameter ison, may simultaneously transmit the PUSCH and the PUCCH, the parameterrepresenting whether simultaneous transmission of the PUSCH and thePUCCH is configured. For example, when the simultaneous transmission ofthe PUSCH and the PUCCH is necessary, the UE may transmit the PUSCH andthe PUCCH in a single slot. Here, when an inter-modulation distortion(IMD) occurs in the UE, the UE may selectively transmit the PUSCH or thePUCCH, or an uplink channel of a format in which the simultaneoustransmission is possible. Alternatively, when a signal attenuation levelin another frequency domain, which caused by interference according toan IMD, meets an RF requirement, the UE may simultaneously transmit thePUSCH and the PUCCH. Here, transmitter inter-modulation representsinter-modulation between a transmission signal transmitted by the basestation or the UE and another strong signal transmitted around the basestation or the UE. Accordingly, in a state where a signal transmittedfrom another base station is co-located, a transmission signal from theother base station, which is detected through an antenna connector ofthe base station, may have a value attenuated by 30 dB. Here, additionalunwanted emission may be restricted even when an interference signal ispresent. A transmission signal from another UE, which is detectedthrough an antenna connector of the UE, may have a value attenuated by40 dB.

At the time of simultaneous transmission of the PUSCH and the PUCCH, asthe distance between frequency resources allocated to the transmissionof the PUSCH and the PUCCH is longer, the IMD may increase. Meanwhile,the PUCCH resource may be configured to be closer to the edge of anuplink transmission band in order to obtain a frequency diversity gain.Accordingly, when the PUSCH and the PUCCH are simultaneouslytransmitted, the IMD may occur except a case where the PUSCH occupiesthe entire uplink transmission band. Here, the frequency resource mayrepresent a subcarrier index of an RE. The UE according to an embodimentof the present disclosure may allocate the PUCCH frequency resource to afrequency resource at a location close to a PUSCH frequency resource.Hereinafter, when the PUSCH and the PUCCH are simultaneously transmittedaccording to an embodiment of the present disclosure, a method for theUE to configure the PUCCH resource will be specifically describedthrough FIGS. 14 to 17.

FIG. 14 illustrates PUCCH frequency resources allocated to frequencyresources at locations consecutive to a PUSCH frequency resourceaccording to an embodiment of the present disclosure. Referring to FIG.14A, PUCCHs may be mapped to frequency resources at locationsconsecutive to the PUSCH frequency resource allocated for PUSCHtransmission. In this case, the frequency resources at the locationsconsecutive to the PUSCH frequency resource may represent frequencyresources at adjacent locations. In addition, there may not be anotherfrequency resource for separating the PUCCH frequency resources from thePUSCH resource between the PUCCH frequency resources and the PUSCHresource in the frequency domain. On the other hand, when two frequencyresources are hopped so as to be able to obtain a frequency diversitygain as in FIG. 14A, data may be not allocated to resources of region“1401” and region “1402”. Referring to FIG. 14B, PUCCH resources may beallocated to a part of the PUSCH resource. In addition, the PUCCHresource may not be frequency hopped. Through this, the UE may prevent awaste of resources in region “1401” and region “1402”.

FIG. 15 illustrates PUCCH resources configured according to anembodiment of the present disclosure. In FIG. 15, region “1503” andregion “1504” may correspond to region “1401” and region “1402” in FIG.14A. Here, PUCCHs mapped to region “1503” and region “1504” may berepeated in region “1501” and region “1502”. For example, the UE maytransmit the PUCCHs mapped to region “1503” and region “1504” throughresources corresponding to region “1501” and region “1502”. In FIG. 15,an interval in which one PUCCH, the long PUCCH and the short PUCCH aretransmitted may be called as a slot interval. Here, a symbol interval ofeach of regions “1501” to “1504” may denote a symbol interval allocatedto a part of the PUCCH, when the PUCCH is frequency hopped in theinterval in which the long PUCCH is transmitted in the slot interval.Through this, the UE may obtain time and frequency diversity gains inthe PUCCH transmission.

FIG. 16 illustrates a PUCCH resource configured according to anembodiment of the present disclosure. Referring to FIG. 16, the UE mayallocate a PUCCH resource to a part of a PUSCH resource withoutfrequency hopping.

In the aforementioned FIGS. 14B and 16, when the PUCCH resource isallocated to a part of the PUSCH resource, the UE may configure a PUCCHresource based on the location of a resource through which a DMRS forthe PUSCH is transmitted. This is because a resource through which theDMRS is transmitted may collide with and the PUCCH resource. Forexample, the UE may puncture a first symbol at which the PUSCH resourcestarts in the PUCCH resource for the PUCCH. Alternatively, the UE mayconfigure a shortened PUCCH obtained by removing the first symbol atwhich the PUSCH resource starts in the PUCCH resource for the PUCCH.This is because a DMRS of the PUSCH may be transmitted when the DMRS isfront loaded, namely, at the first symbol at which the PUSCH resourcestarts. When the PUCCH is the aforementioned long PUCCH, the shortenedPUCCH may be referred to as a shortened long PUCCH. Here, the number ofsymbols forming the long PUCCH in a single slot may be any one among {4,5, 6, 7, 8, 9, 10, 11, 12, 13, 14}.

When the number of symbols forming the long PUCCH is 4, the shortenedlong PUCCH may be configured with 3 symbols. Here, the base station maynot be expected to receive the PUCCH in a symbol to which the DMRS ismapped among the PUSCH resources. Alternatively, when the number ofsymbols configuring the long PUCCH is 4, the UE may not allocate thePUCCH resource on the PUSCH resource according to the configuration ofthe base station. In this case, the UE may selectively transmit only onebetween the PUSCH and the PUCCH. In addition, the UE may transmit onlyone between the PUSCH and the PUCCH based on a type of the UCItransmitted through the PUCCH. For example, when the number of symbolsconfiguring the PUCCH for the HARQ-ACK information is 4, the UE maytransmit only the PUCCH between the PUSCH and the PUCCH to betransmitted simultaneously. It is because the HARQ-ACK information is aresponse to DL transmission. Alternatively, when the PUCCH composed of 4symbols is configured from the base station, the UE may map UCI to betransmitted through the PUCCH resource to a preset PUSCH resource andtransmit the UCI. Alternatively, the UE may not transmit the DMRSthrough the PUSCH resource.

Hereinafter, description will be provided through FIGS. 17A to 17C abouta method for the UE to configure a PUCCH resource, when the PUCCHresource is moved onto a PUSCH resource and collides with a DMRSresource. FIGS. 17A to 17C illustrate the DMRS resource for transmittingthe DMRS and the PUCCH resource allocated to a part of the PUSCHresource according to an embodiment of the present disclosure.

Referring to FIGS. 17B and 17C, another part of a PUSCH except a DMRSmay not be allocated to a frequency resource to which a PUCCH isallocated. In this case, when the sequence characteristics of the DMRS,which is a part of the PUSCH, are to be maintained for MU-MIMOmultiplexing with another UE, the base station may configure to transmita shortened PUCCH to the UE, and the UE may perform transmission usingthe shortened PUCCH. On the other hand, when the DMRS, which is a partof the PUSCH, is not configured with a sequence and is notCDM-multiplexed for MU-MIMO with other UEs, since the PUSCH is notincluded in a region to which the PUCCH is moved, the long PUCCH may betransmitted without using the shortened PUCCH as shown in FIGS. 14 to16.

According to an embodiment, when the PUCCH resource is allocated to apart of the PUSCH resource, the UE may puncture a symbol allocated tothe PUCCH resource or a symbol allocated to the DMRS resource among thePUSCH resource. Here, UL DCI for scheduling the PUSCH may include apuncturing indicator for puncturing any one between the symbol allocatedto the PUCCH resource and the symbol allocated to the DMRS resource. TheUE may puncture any one between the symbol allocated to the PUCCHresource and the symbol allocated to the DMRS resource based on thepuncturing indicator. More specifically, when the PUCCH resource isallocated to a first PUSCH resource that is a part of the PUSCHresource, the UE may puncture the first PUSCH resource. According toanother embodiment, when the PUCCH is configured to be periodicallytransmitted, the first PUSCH resource may be configured to berate-matched in a period at which the PUCCH is to be transmitted.

In addition, the base station may determine whether to puncture orrate-match the first PUSCH resource based on the UCI transmitted throughthe PUCCH. For example, when the PUCCH includes transmission of HARQ-ACKinformation, the UE may puncture the first PUSCH resource according tothe configuration of the base station. In addition, when the PUCCHincludes transmission of only the UCI other than the HARQ-ACKinformation, the UE may transmit the UCI through the first PUSCHresource rate-matched according to the configuration of the basestation. Here, the UCI other than the HARQ-ACK information may includeat least any one among a CQI, an RI, a PMI or beam-related information.When the DL transmission is lost, the HARQ-ACK information may not betransmitted. On the contrary, the base station having performed the DLtransmission may expect to receive the HARQ-ACK information. In thiscase, when the PUSCH resource for transmitting the HARQ-ACK informationis configured to be rate-matched and the DL transmission is lost, thebase station may also fail to decode the UCI other than the HARQ-ACKinformation transmitted through the PUCCH. Unlike this, when the PUCCHincludes only transmission of channel state reporting such as a CQI, anRI, a PMI or beam-related information, mismatch may not occur even whenthe first PUSCH resource is rate-matched. This is because the channelstate reporting may be set to be periodically transmitted through thePUCCH. In addition, the transmission period of the channel statereporting may be configured through an RRC signal. Accordingly, the basestation may predict a slot or a subframe in which the PUCCH includingthe channel state reporting is transmitted.

In the description about FIGS. 14 to 17, as a slot format, a UL-centricslot format is exemplified which represents a case where the number ofUL symbols in a single slot is larger than that of the DL symbols, butthe present disclosure is not limited thereto. For example, the methoddescribed through the FIGS. 14 to 17 may also be applied identically toa slot including only UL transmission. In addition, the DMRS resourceallocated to transmit the DMRS for the PUSCH may not be front loaded. Inaddition, the DMRS resource may be additionally loaded to the front andan RE at a different location from the front. This is because anadditional RS may be required to improve performance due to a highDoppler frequency environment.

Meanwhile, FIG. 18 illustrates HARQ-ACK information mapped onto a PUSCHresource according to an embodiment of the present disclosure. Referringto FIG. 14, the UE may transmit the HARQ-ACK information, which is onekind of the UCI, through a RE located close to a DMRS symbol for a ULDMRS. This is because as it is closer to the DMRS symbol, the higher thechannel estimation performance. When transmitting a PUCCH that allocatesan uplink transmission resource for the HARQ-ACK information, the basestation may expect to receive the HARQ-ACK information from the UE.Here, when not receiving the PUCCH, the UE may not multiplex theHARQ-ACK information on the PUSCH. When the PUSCH for transmitting theHARQ-ACK information is transmitted through a rate-matched PUSCHresource, the base station may also fail to decode data other than theHARQ-ACK information received from the UE. This is because, when thePUSCH for transmitting the HARQ-ACK information is transmitted through arate-matched PUSCH resource, a rate-matching pattern may vary accordingto whether the HARQ-ACK information is to be transmitted. Accordingly,the HARQ-ACK information may be punctured on a UL-SCH bitstream. Whenthe HARQ-ACK information is punctured, data, which is not punctured onthe PUSCH, may be decoded regardless of the presence or absence of theHARQ-ACK information.

In addition, referring to FIG. 18, an RI, which is one kind of the UCI,may be transmitted through an RE located close to the DMRS symbolsimilarly to a method for mapping HARQ-ACK information to an RE. This isbecause the RI is preferentially required in order to analyze theaforementioned CQI and PMI. As a modulation scheme for the RI, amodulation scheme is used which is identical to that for the HARQ-ACKinformation. The HARQ-ACK information and the RI may be repeated inmultiple transmission layers, coated in each layer and then multiplexed.For example, a plurality of bits representing the HARQ-ACK informationand the RI may be scrambled in each transmission layer according todifferent RNTIs. Through this, the UE may obtain a diversity gainthrough the multiple transmission layers.

The channel state reporting on the PUSCH resource may be performedaperiodically. For example, the base station may configure the UE totransmit the channel state reporting. The UE may rate-match a UL-SCHbased on the presence or absence of the channel state reporting. For thechannel state reporting, the UE may rate-match the UL-SCH to use arelatively high coding rate. In this case, the base station mayrecognize the presence or absence of the channel state reporting toperform rate-matching. This is because the base station requests for thechannel state reporting. In addition, when the UE is scheduled toperform PUSCH transmission and periodic channel state reporting isconfigured to be transmitted on a PUCCH in a subframe in which the PUSCHis transmitted, the periodic channel state reporting of the UE may bechanged to be transmitted on the PUSCH resource. In this case, the basestation may recognize the presence or absence of the periodic channelstate reporting to perform rate-matching. This is because the basestation may recognize which frame the periodic reporting is transmittedin. In addition, the transmission time of the periodic reporting is setby an RRC signal.

According to an embodiment of the present disclosure, the UE, which hasreceived an RRC signal in which a PUSCH-PUCCH configuration parameter isoff, may not simultaneously transmit the PUSCH and the PUCCH, theparameter representing whether the simultaneous transmission of thePUSCH and the PUCCH is configured. Here, the UE may piggyback the UCIincluded in the PUCCH, which is to be simultaneously transmitted withthe PUSCH, on the PUSCH resource and then transmit the UCI. Hereinafter,descriptions will be provided more specifically about a method for a UEaccording to an embodiment of the present disclosure to piggyback theUCI included in the PUCCH on the PUSCH and transmit the UCI withreference to FIGS. 19 to 23.

FIG. 19 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to an embodiment of the present disclosure. According to anembodiment, the UE may preferentially map the HARQ-ACK information to betransmitted to a subcarrier corresponding to a symbol following a DMRSsymbol. Here, the DMRS symbol may be a symbol allocated for a UL PUSCHDMRS allocated from the base station. Here, the symbol following theDMRS symbol among subsequent symbols of the DMRS symbol may be adjacentto the DMRS symbol. In addition, the number of REs necessary for theHARQ-ACK information to be transmitted by the UE may exceed the numberof REs for each symbol of the PUSCH resource. In this case, the UE mayadditionally map the HARQ-ACK information to an RE of a symbol followingthe adjacent symbol. This is because as it is closer to the location ofthe DMRS symbol, the higher the channel estimation performance. The UEmay compensate for reduction in the channel estimation performance in ahigher Doppler frequency environment in which the UE moves fast and thusa channel in a slot changes fast. In addition, in a wirelesscommunication environment using an mmWave, the UE may transmit theHARQ-ACK information in the same symbol to obtain a beamforming gain forthe HARQ-ACK information. This is because, in the mmWave environment,beamforming may be performed in the same symbol.

FIG. 20 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to an embodiment of the present disclosure. According to anembodiment, a DMRS for a PUSCH may be allocated to distributed REs on asymbol in an interleaving frequency division multiple access (IFDMA)scheme. As in FIG. 20, a DMRS RE for the DMRS may be mapped to aresource spaced apart by a preset subcarrier interval on the samesymbol. In this case, the UE may preferentially map the HARQ-ACKinformation to an RE corresponding to a subcarrier index of the DMRS REamong REs of a symbol following the DMRS symbol. In addition, the numberof REs necessary for the HARQ-ACK information to be transmitted by theUE may exceed the number of DMRS REs. In this case, the UE mayadditionally map the HARQ-ACK information to an RE adjacent to thepreferentially mapped RE in the frequency domain among REs of a symbolfollowing the DMRS symbol. Here, the adjacent RE may be an REcorresponding to a subcarrier index continuous from the subcarrier indexof the DMRS RE. Alternatively, unlike FIG. 20, the UE may additionallymap the HARQ-ACK information to an RE adjacent to the DMRS RE in thefrequency domain among REs of a symbol following the DMRS symbol.Alternatively, the UE may preferentially map the HARQ-ACK information toan RE adjacent to the DMRS RE among the REs of the DMRS symbol, andadditionally map to an RE corresponding to the subcarrier index of theDMRS RE This is because as it is closer to the location of the DMRSsymbol, the higher the channel estimation performance. The UE maycompensate for reduction in the channel estimation performance in ahigher Doppler frequency environment in which the UE move fast and thusa channel in a slot changes fast. In addition, in a wirelesscommunication environment using an mmWave, the UE may transmit theHARQ-ACK information in the same symbol to obtain a beamforming gain forthe HARQ-ACK information. This is because, in the mmWave environment,beamforming may be performed in the same symbol. In addition, the UE mayadditionally obtain a frequency diversity gain in comparison to theembodiment of FIG. 19 in HARQ-ACK information transmission in the PUSCHresource in the frequency domain.

FIG. 21 illustrates HARQ-ACK information mapped onto a PUSCH resourceaccording to an embodiment of the present disclosure. Similar to FIG.20, a DMRS for a PUSCH may be allocated to distributed REs on a symbolin the IFDMA scheme. ADMRS RE for the DMRS may be mapped to a resourcespaced apart by a preset subcarrier interval on the same symbol. In thiscase, the UE may preferentially map the HARQ-ACK information to an REcorresponding to a subcarrier index of the DMRS RE among REs of a symbolfollowing the DMRS symbol. In addition, the number of REs necessary forthe HARQ-ACK information to be transmitted by the UE may exceed thenumber of DMRS REs. In this case, the UE may additionally map theHARQ-ACK information to an RE corresponding to a subcarrier index of theDMRS RE among REs of a symbol following a symbol to which a part of theHARQ-ACK information is preferentially mapped. Through this, the UE mayadditionally obtain a time diversity gain in comparison to theembodiment of FIG. 20 in HARQ-ACK information transmission in the PUSCHresource in the frequency domain.

Meanwhile, according to an embodiment of the present disclosure, antennaports of a DMRS for a PUSCH may be two or more. FIGS. 22 and 23illustrate UCI mapped onto a PUSCH resource, when two or more antennaports are allocated to the DMRS according to an embodiment of thepresent disclosure. The base station may allow the UE to form two ormore DMRS antenna ports for the PUSCH. The UE may transmit the DMRSthrough multiple transmission layers using the two more antenna portsconfigured by the base station. In this case, the UE may map the UCI,which is transmitted through the PUSCH, to the PUSCH resource based onan RE allocated for the DMRS transmission for each antenna port. Inaddition, the configuration type of the RE for the DMRS may be changedaccording to a CP-OFDM and a DFT-S-OFDM that are waveforms used in anuplink. Accordingly, the UE may map the UCI to the PUSCH resource basedon antenna port-related information and information about the waveform.

The UE using the DFT-S-OFDM waveform in the uplink may transmit aPUSCH-allocated frequency resource using a Zardoff-Chu sequence in aspecific symbol(s) for the DMRS. Alternatively, the UE using theDFT-S-OFDM waveform in the uplink may transmit the DMRS based on a PUSCHDMRS structure in the IFDMA scheme. This is because another UE(s) usingthe CP-OFDM waveform may transmit the DMRS based on the PUSCH DMRSstructure in the IFDMA scheme. In this case, the UE may map the UCI ontothe PUSCH resource in the same method regardless of the waveform. First,according to an embodiment of the present disclosure, regardless ofwhether the waveform used in the uplink is the CP-OFDM waveform orDFT-S-OFDM waveform, a method for mapping the HARQ-ACK information ontothe PUSCH resource will be described.

Referring to FIG. 22, the UE may preferentially map the HARQ-ACKinformation to a first antenna port (antenna port 0) configured astransmission on a first layer among the antenna ports of the DMRS. TheUE preferentially map the HARQ-ACK information to an RE having the samesubcarrier index as a subcarrier index of an RE corresponding to thefirst antenna port among REs of a symbol following the DMRS symbol. Thisis because the DFT-S-OFDM waveform is restricted to single streamtransmission, and the CP-OFDM transmission may also be transmittedthrough a single stream when the SNR is low. In addition, the number ofREs necessary for the HARQ-ACK information to be transmitted by the UEmay exceed the number of DMRS REs corresponding to the first antennaport of the DMRS. In this case, the UE may additionally map the HARQ-ACKinformation to an RE adjacent to the preferentially mapped RE in thefrequency domain among the REs of a symbol following the DMRS symbol.Here, the adjacent RE may be an RE corresponding to a subcarrier indexcontinuous from the subcarrier index of the DMRS RE. This is because asit is closer to the location of the DMRS symbol, the higher the channelestimation performance. The UE may compensate for reduction in thechannel estimation performance in a higher Doppler frequency environmentin which the UE moves fast and thus a channel in a slot changes fast. Inaddition, in a wireless communication environment using an mmWave, theUE may transmit the HARQ-ACK information in the same symbol to obtain abeamforming gain for the HARQ-ACK information.

Referring to FIG. 23, the UE may preferentially map the HARQ-ACKinformation to the first antenna port (antenna port 0) configured astransmission on the first layer among the antenna ports of the DMRS.Similarly to FIG. 22, the number of REs necessary for the HARQ-ACKinformation to be transmitted by the UE may exceed the number of REscorresponding to the first antenna port of the DMRS. In this case, theUE may additionally map the HARQ-ACK information to an RE correspondingto the first antenna of the DMRS among REs of a symbol following asymbol to which a part of the HARQ-ACK information is preferentiallymapped. Through this, the UE may additionally obtain a time diversitygain in comparison to the embodiment of FIG. 22 in HARQ-ACK informationtransmission in the PUSCH resource in the frequency domain.

Hereinafter, according to an embodiment of the present disclosure,puncturing and rate-matching for a PUSCH resource will be described whenHARQ-ACK information is mapped onto a PUSCH resource to be transmitted.According to an embodiment, when configuring the UE to map the UCI ontothe PUSCH resource allocated to the UE, the base station may configurethe PUSCH resource onto which the UCI is mapped is always punctured.Alternatively, the base station and UE are allowed to turn on/offsimultaneous transmission of a PUCCH and a PUSCH through an RRC signal,and thus the base station may recognize whether the UCI is transmittedthrough the PUSCH or the PUCCH. In this case, the PUSCH resource towhich the UCI is mapped may be configured to be always rate-matched.Meanwhile, in case of DTX in which a PDCCH, as scheduling informationfrom the base station, is not received by the UE, the base station mayexpect HARQ-ACK information to be transmitted and may performrate-matching to decode a UL-SCH. Here, the UE may not be configured totransmit the HARQ-ACK information, when the PDCCH is not received. Inthis case, in decoding, by the base station, the UL-SCH transmittedthrough the PUSCH from the UE, a mismatch in rate-matching may occurbetween the base station and the UE.

In addition, when UCI is mapped to an RE on a PUSCH resource and isconfigured to be transmitted by the UE as in FIGS. 19 to 21, applicationof puncturing or rate-matching in the PUSCH resource may be changed foreach UCI type. For example, for a PUSCH resource through which at leastthe HARQ-ACK information is transmitted, the base station may configurethe UE to puncture the PUSCH resource. On the other hand, for a PUSCHresource through which UCI (at least one among a CQI, an RI, a PMI, andbeam-related information) other than the HARQ-ACK information istransmitted, the base station may configure the UE to performrate-matching on the PUSCH resource. When the DL transmission is lost,the UE may not transmit the HARQ-ACK information. On the contrary, thebase station may expect to receive the HARQ-ACK information.Accordingly, when the PUSCH resource for transmitting the HARQ-ACKinformation is configured to be rate-matched and the DL transmission islost, the base station may also fail to decode the UCI other than theHARQ-ACK information transmitted through the PUCCH. Unlike this, whenthe PUCCH includes only transmission of channel state reporting such asthe CQI, RI, PMI or beam-related information, mismatch may not occureven when the PUSCH resource is rate-matched.

Hereinafter, a method in which an RI is mapped onto a PUSCH resourcewill be described according to an embodiment of the present disclosure.The RI may be mapped onto the PUSCH resource in association with amanner in which HARQ-ACK information is mapped onto the PUSCH resource,which is described through FIGS. 19 to 21. For example, on the PUSCHresource, the RI may be mapped to consecutive REs in the time domain orthe frequency domain among REs to which the HARQ-ACK information ismapped. According to embodiment, in an allocated PUSCH resource, the RImay be sequentially mapped to from an RE of a symbol following a symbolincluding the last RE among REs to which the HARQ-ACK information issequentially mapped. Here, the method in which the HARQ-ACK informationis sequentially mapped may be the method described through FIG. 19, 20or 21. In addition, the UE may map the HARQ-ACK information to the RE ofthe corresponding symbol in a method identical or corresponding to themethod in which the HARQ-ACK information is sequentially mapped, whichis described through FIG. 19, 20, or 21.

According to another embodiment, an RI may be sequentially mapped tofrom an RE adjacent to the last RE in the same symbol as that of thelast RE among REs to which the HARQ-ACK information is sequentiallymapped. In addition, the RI may also be mapped to from a symbolfollowing a symbol to which the HARQ-ACK information is mapped. Forexample, when a symbol in which a DMRS is transmitted is a first symboland a symbol in which the HARQ-ACK information is transmitted is asecond symbol, the RI may be mapped to a third symbol. In addition, theRI may be mapped to an RE corresponding to a subcarrier index to whichthe DMRS is allocated among an RE(s) of the third symbol in a schemesimilar to the mapping method of the HARQ-ACK information.

Hereinafter, a method in which beam-related information is mapped onto aPUSCH resource will be described according to an embodiment of thepresent disclosure. According to the embodiment, the beam-relatedinformation may be mapped onto a symbol other than the PUSCH resource towhich the HARQ-ACK information and the RI are mapped. Here, thebeam-related information may be mapped closest to the RE to which theDMRS is mapped in the UCI other than the HARQ-ACK information and theRI. In addition, among symbols on a UL slot, the beam-relatedinformation may be mapped to the most leading symbol except for the REsto which the HARQ-ACK information and the RI are mapped. Thebeam-related information is required for the base station and the UE toperform matching on each other for DL/UL beamforming, and thus ispreferable to be transmitted in the front.

Hereinafter, a method in which channel state information such as theCQI/PMI is mapped onto a PUSCH resource will be described according toan embodiment of the present disclosure. According to an embodiment, thechannel state information may be mapped onto a symbol to be transmittedfollowing the HARQ-ACK information, the RI and the beam-relatedinformation in the PUSCH resource. This is because a beamformingdirection may be different for each symbol in an mmWave system, and asub-6 GHz system and a system using mmWave of 6 GHz or more do not adoptmethods different from each other.

On the other hand, according to an embodiment of the present disclosure,the UE may indicate information representing whether the PUSCH resourceis rate-matched in relation to transmission of the HARQ-ACK informationmapped onto the PUSCH resource. As described above, in a situation inwhich the base station expects to receive the HARQ-ACK information fromthe UE, the UE may not transmit the HARQ-ACK information due to a DTX orthe like. This is because, when a transmission resource is rate-matched,information mismatching may occur between the base station and the UE.Hereinafter, descriptions will be provided about a method for explicitlyor implicitly indicating rate-matching related information thatrepresents whether or not the UE rate-matches the PUSCH resource,

According to an embodiment, when the HARQ-ACK information is mapped ontothe PUSCH resource and then transmitted, the UE may rate-match the PUSCHresource. For example, the UE may determine whether to performrate-matching based on a PDCCH that schedules a PDSCH to be transmittedfrom the base station. In detail, when the HARQ-ACK informationcorresponding to the PDSCH is set to 3 bits or more, the UE mayrate-match the PUSCH resource. In addition, when it is configured toperform rate-matching on the HARQ-ACK information corresponding to thePDSCH, the UE may rate-match the PUSCH resource. In this case, in orderto prevent mismatching, the base station may perform decoding in ascheme that the UE assumes rate-matching for the PUSCH and in a schemethat rate-matching is not assumed to be performed. This may increase thecomplexity of the base station.

According to an embodiment, the UE may explicitly indicate rate-matchingrelated information through L1 signaling. More specifically, the UE mayindicate whether a UL-SCH is rate-matched on a corresponding PUSCH REusing a short PUCCH format on a slot (a UL slot or a UL-centric slot)through which a PUSCH intended to be transmitted is transmitted. Whenthe rate-matching related information is transmitted using the shortPUCCH format, the rate-matching related information may be set to betransmitted through a first symbol or first and second symbols in a slotset to be TDMed with the PUSCH. In addition, the rate-matching relatedinformation may be set to be transmitted using the short PUCCH formatthrough a first symbol from the last symbol or the first and secondsymbols from the last symbol among symbols in the slot set to be TDMedwith the PUSCH. The base station may decode a PUCCH having beentransmitted from the HE to acquire the rate-matching relatedinformation. In addition, the base station may be configured to performPUSCH decoding based on the rate-matching related information to ensurethe PUSCH decoding performance.

According to another embodiment, the UE may implicitly indicaterate-matching related information. For example, when rate-matching aPUSCH resource in relation to transmission of HARQ-ACK informationmapped onto the PUSCH resource according to a configuration by the basestation, the UE may apply phase rotation and/or constellation rotationto other data on the PUSCH resource, or the UCI on the PUSCH resource,and then transmit the other data or the UCI. Alternatively, the UE mayapply the phase rotation and/or the constellation rotation to a DMRS forPUSCH demodulation, and then transmit the DMRS. Alternatively, whenusing a DFT-S-OFDM waveform, the UE may be configured to transmit theDMRS using a sequence cyclic-shifted from a base sequence based on a CSvalue determined by a preset method. Here, the preset method may be amethod for determining a CS value of a Zardoff-Chu sequence of the DMRSfor demodulating the PUSCH allocated to the UE as a CS value having afarthest interval from a CS value indicated through DCI from the basestation. Alternatively, the UE may be configured to apply the phaserotation and/or the constellation rotation to a subset including atleast one among data, UCI or DMRS on the PUSCH resource, and thentransmit the subset. When detecting the phase rotation and/or theconstellation rotation for the subset including the at least one amongdata, UCI or DMRS on the PUSCH resource, the base station may determinethat the rate-matching related information has received. For example,when detecting the phase rotation and/or the constellation rotation forthe subset including the at least one among data, UCI or DMRS on thePUSCH resource, the base station may determine that the HARQ-ACKinformation-mapped PUSCH has been rate-matched and transmitted. Inaddition, the UE may change a preset scrambling sequence, which isapplied to the subset including the at least one among data, UCI or DMRSon the PUSCH resource, to indicate the rate-matching relatedinformation.

A wireless communication system according to an embodiment of thepresent disclosure, in particular, a cellular wireless communicationsystem provides a method for efficiently transmitting signals and adevice therefor. In addition, a wireless communication system accordingto an embodiment of the present disclosure provides a wirelesscommunication method for transmitting and receiving an uplink controlchannel and a device therefor.

The method and system of the present disclosure are described inrelation to specific embodiments, configuration elements, a part of orthe entirety of operations of the present disclosure may be implementedusing a computer system having general purpose hardware architecture.

The aforementioned description of the present disclosure has beenpresented for the purposes of illustration and description. It isapparent to a person having ordinary skill in the art to which thepresent disclosure relates that the present disclosure can be easilymodified into other detailed forms without changing the technicalprinciple or essential features of the present disclosure. Therefore,these embodiments as described above are only proposed for illustrativepurposes and do not limit the present disclosure. For example, eachcomponent described to be of a single type can be implemented in adistributed manner. Likewise, components described to be distributed canbe implemented in a combined manner.

The scope of the present disclosure is presented by the accompanyingClaims rather than the aforementioned description. It should beunderstood that all changes or modifications derived from thedefinitions and scopes of the Claims and their equivalents fall withinthe scope of the present disclosure.

The invention claimed is:
 1. A User Equipment (UE) in a wirelesscommunication system, the UE comprising: a processor configured to:transmit uplink control information (UCI) which includes hybridautomatic repeat request acknowledgment (HARQ-ACK) informationrepresenting a response to a downlink channel having been received froma base station, a scheduling request (SR) representing whether torequest for uplink resource allocation, and a beam recovery request (BR)representing whether to request for recovery for a beam failure, when anumber of bits of the UCI does not exceed 2, determine a first cyclicshift (CS) value based on the HARQ-ACK information, determine a CSoffset based on request information representing a request to betransmitted from the UE to the base station, determine a second CS valuerepresenting a degree of cyclic-shifting a base sequence to be used in aphysical uplink control channel (PUCCH) on based on the first CS valueand the CS offset, and transmit the UCI using a sequence based PUCCHformat generated by cyclic-shifting the base sequence based on thesecond CS value, when the number of bits of the UCI exceeds 2, transmitthe UCI using a frequency division multiplexing (FDM) based PUCCHformat.
 2. The UE of claim 1, wherein, when the number of bits of theUCI exceeds 2, wherein the UCI includes one or more bits representingthe HARQ-ACK information, one or more bits representing the SR, and oneor more bits representing BR.
 3. The UE of claim 1, wherein the secondCS value is any one among a plurality of CS values determined accordingto the CS offset and a number of bits representing the HARQ-ACKinformation, the plurality of CS values are configured with CS valuesthat are different from each other and increase by an identical intervalbased on a smallest CS value among the plurality of CS values, and asize of the interval is constant regardless of whether the SR is thepositive SR.
 4. The UE of claim 3, wherein the base sequence iscyclic-shifted with N CS values which are different from each other, theHARQ-ACK information comprises m bits, and the size of the interval isN/(2{circumflex over ( )}m).
 5. The UE of claim 4, wherein m is 2, and Nis
 12. 6. The UE of claim 5, wherein when the SR is the positive SR, theCS offset is 1, and when the SR is not the positive SR, the CS offset is0.
 7. The UE of claim 6, wherein when the SR is not the positive SR, thesecond CS value is one among 0, 3, 6, and
 9. 8. The UE of claim 7,wherein when the SR is the positive SR, the second CS value is one among1, 4, 7, and
 10. 9. The UE of claim 1, wherein a transmission resourceof the sequence based PUCCH format is one resource block representing 12subcarriers in a frequency domain.
 10. The UE of claim 9, wherein eachof the transmission resource of the sequence based PUCCH format andtransmission resource of the FDM based PUCCH format are one or twosymbols in a time domain.
 11. The UE of claim 1, wherein a PUCCHresource for the SR and a PUCCH resource for the BR are independentlyconfigured.
 12. The UE of claim 11, wherein the processor furtherconfigured to: when the number of bits of the UCI does not exceed 2 andthe BR is not a positive BR which request information on a beam,transmit the SR and the HARQ-ACK information through the PUCCH resourcefor the SR, and when the number of bits of the UCI does not exceed 2 andthe BR is the positive BR, transmit the BR and the HARQ-ACK informationthrough the PUCCH resource for the BR.
 13. A method of wirelesscommunication by a User Equipment (UE) operates in a wirelesscommunication system, the wireless communication method comprising:transmitting uplink control information (UCI) which includes hybridautomatic repeat request acknowledgment (HARQ-ACK) informationrepresenting a response to a downlink channel having been received froma base station, a scheduling request (SR) representing whether torequest for uplink resource allocation, and a beam recovery request (BR)representing whether to request for recovery for a beam failure, when anumber of bits of the UCI does not exceed 2, determining a first cyclicshift (CS) value based on the HARQ-ACK information, determining a CSoffset based on request information representing a request to betransmitted from the UE to the base station; determining a second CSvalue representing a degree of cyclic-shifting a base sequence to beused in a physical uplink control channel (PUCCH) based on the first CSvalue and the CS offset, transmitting the UCI using a sequence basedPUCCH format generated by cyclic-shifting the base sequence based on thesecond CS value, and when the number of bits of the UCI exceeds 2,transmitting the UCI using a frequency division multiplexing (FDM) basedPUCCH format.
 14. The method of claim 13, wherein, when the number ofbits of the UCI exceeds 2, wherein the UCI includes one or more bitsrepresenting the HARQ-ACK information, one or more bits representing theSR, and one or more bits representing BR.
 15. The method of claim 13,wherein the second CS value is any one among a plurality of CS valuesdetermined according to the CS offset and a number of bits representingthe HARQ-ACK information, the plurality of CS values are configured withCS values that are different from each other and increase by anidentical interval based on a smallest CS value among the plurality ofCS values, and a size of the interval is constant regardless of whetherthe SR is the positive SR.
 16. The method of claim 15, wherein the basesequence is cyclic-shifted with N CS values which are different fromeach other, the HARQ-ACK information comprises m bits, and the size ofthe interval is N/(2{circumflex over ( )}m).
 17. The method of claim 16,wherein when the SR is a positive SR, the CS offset is 1, and when theSR is not the positive SR, the CS offset is
 0. 18. The method of claim17, wherein when the SR is not the positive SR, the second CS value isone among 0, 3, 6, and
 9. 19. The UE of claim 13, wherein a PUCCHresource for the SR and a PUCCH resource for the BR are independentlyconfigured.
 20. The UE of claim 19, wherein the transmitting the UCIusing the sequence based PUCCH format further comprises: when the numberof bits of the UCI does not exceed 2 and the BR is not a positive BRwhich requests a recovery for a beam failure, transmitting the SR andthe HARQ-ACK information through the PUCCH resource for the SR, and whenthe number of bits of the UCI does not exceed 2 and the BR is thepositive BR, transmitting the BR and the HARQ-ACK information throughthe PUCCH resource for the BR.